Some MCQs for physics

If 900 question in organic chemistry weren't enough let's crack these:

MULTIPLE CHOICE QUESTIONS
Five Year Papers
1. As a result of constant unbalanced force a body moves with __________.
(Uniform velocity, Uniform Speed, Uniform acceleration, Variable Acceleration)
2. The range of the Ghori missile is __________.
(1500km, 2000km, 2500km)
3. The velocity of a wave of wavelength l and frequency n is given by __________.
(n/l, l/n, nl, 1/ln)
4. In aerodynamics the ratio of the velocity of the sound waves to the velocity of the
source is called __________.
(Beats, Mach Number, Harmonics)
5. The structure of a crystal can be studied with the help of __________ of x-rays.
(Interference, Diffraction, Polarization)
6. The speed of sound __________.
(Increases with temperature, Decreases with temperature, Does not change with temperature)
7. Sound waves are __________.
(Longitudinal waves, Transverse waves, Not made of material medium)
8. If the vector addition of two vectors of magnitude 3 units and 4 units has a resultant
of 5 units, then the angle between those two vectors is __________.
(0°, 45°, 90°)
9. A raindrop continues to fall with a uniform velocity when __________.
(its weight is balanced by air friction, its weight is balanced by air friction and upthrust, Its weight is
balanced by upthrust)
10. Every point on a rotating body has the same __________.
(Linear Velocity, Angular Velocity, Angular Momentum)
11. When a body is thrown vertically upwards, it is a case of __________.
(Free fall motion, Projectile motion, Under gravity motion)
12. The characteristic of a musical sound, which distinguishes between the notes of the
same pitche and intensity, is known as __________.
(Quality, Loudness, Intensity)
13. Sound wave travels faster in __________.
(Air, Water, Iron)
14. __________ of the following phenomena cannot be explained by the wave theory.
(Interference, Fiffraction, Photographic Effect)
15. In Newton’s rings, the central spot is always __________.
(Dark, Bright, red)
16. When a particle move in a circle, the angle between its linear velocity ‘v’ and
angular velocity ‘w’ is always __________.
(90°, 180°, 0°)
17. They physical quantity which produces angular acceleration is called __________.
(Centripetal force, centrifugal force, Torque)
18. A string stretched between two fixed points is vibrating in one segment. The
frequency generated is called __________.
(1st overtone, Fundamental Frequency, Normal harmonics)
19. The loudness of sound depends upon __________.
(Wavelength, Frequency, amplitude)
20. When the temperature of air rises, the speed of sound waves increases because
__________.
(frequency of the wave increases, only wavelength increases, both the frequency and wavelength
increases)
21. A monochromatic light beam is entering from one medium into another.
__________ of the following properties remains unchanged.
(amplitude, velocity, wavelength, frequency)
22. The angular speed of the second hand of a watch is __________.
(p/30 rad/s, 1rad/s, prad)
23. When a sound source moves towards a stationary listener there is __________.
(an apparent increase in wavelength, an apparent increase in frequency.
A decrease in pitche.)
24. Colour in soap bubbles is due to __________.
(Polarization of light, interference of light, reflection of light)
25. A body remains at rest or continuous to move with a uniform velocity unless it is
acted upon by __________.
(an unbalanced force, A force equal to the weight of the body, a force)
26. Friction is a self-adjusting force. __________.
(It increases iindefinitely with the external force, it does not increase indefinitely with the external force, it
remains constant)
27. The dispersion of white light into seven different colours when passed through a
prism is due to __________.
(different intensities, different amplitudes, different wavelengths)
28. A pendulum bob is swinging with simple harmonic motion. Its potential energy is
maximum at __________.
(Extreme position, mean postiion, at any other point along the path)
29. When light enters into a denser medium, its velocity __________.
(Increases, Decreases , remain the same)
30. Electromagnetic waves consist of an oscillatory electric field E and an oscillatory
magnetic field B. Both fields are __________.
(Perpendicular to each other, parallel to each other, parallel to the direction of propagation of the waves)
31. A particle moving with a uniform speed in a circle has __________ acceleration.
(zero, maximum, uniform)
32. If the distance between the centre of the body and the centre of the earth increases
the value of g __________.
(increases, decreases, remains the same)
33. Motion under elastic restoring force is called __________.
(Simple harmonic motion, Circular motion, Linar Motion)
Chapter 1
The Scope of Physics
1. The branch of physical science, which deals with interaction of matter and energy, is
called __________.
(Physics, Chemistry, Biology)
2. The new era of modern physics began near the end of __________.
(17th century, 18th century, 19th century)
3. Screw and lever were invented by __________.
(Newton, Huygen, Archimedes)
4. Phythagoras is famous in __________.
(Physics, Chemistry, None of these)
5. In the field of research the strong incentive comes from __________.
(Bible, Quran, Ingeel)
6. Number of ayah which are taken from Surah Nooh for our book are __________.
(11 and 12, 13 and 14, 15 and 16)
7. Number of ayah taken from Surah ‘Al Imran’ __________.
(170 and171, 180 and 181, 190 and 191)
8. Al-Khawarizmi was the founder of __________.
(Microbiology, Analytical Algebra, Physics)
9. Logarithm was invented by __________.
(Al- Beruni, Al-Khawarizmi, Ibn-e- Sina)
10. In Muslim world the man was both a poet and a mathematician is __________.
(Omer Khyyam, Al-Khawarizmi, Al-Beruni)
11. Kitabul Manazir was written by __________.
(Yaqoob Bin Ishaq, Ibn-e-Sina, Ibn-al-Haitham)
12. Pin hole camera was invented by __________.
(Ibn-al-Haithan, Al-Razi, Al-Beruni)
13. Ibn-e- Sina was famous for his research in the field of __________.
(Medicine, mathematics, physics)
14. Muslim scientist who wrote about 200 books is __________.
(Abn-e-Sina, Al-Razi, Omer khyyam)
15. 20th century is called the century of __________.
(Physics, Chemistry, Mathematics)
16. Dimension of acceleration is __________.
(LT-1, LT-2, L-1T)
17. The significant figures of 16, 7 are __________.
(7, 6 and 7, 1, 6 and 7)
18. The author of Kitab-ul-Masoodi was __________.
(Al-Beruni, Ibn-e-Sina, Ibn-al-Haitham)
19. The author of Al-Qanun-Fil-Tib was __________.
(Al-Beruni, Ibn-e-Sina, Ibn-al-Haitham)
20. Alsh-Shifa an encyclopedia of philosophy was written by __________.
(Al-Beruni, Ibn-e-Sina, Abn-al-Haitham)
21. Atomic clock is a (briefly) radio transmitter giving out short waves of wavelength
about __________.
(3cm, 3m, 3A°)
22. The time interval occupied 9192631770 cycles of a specified energy change in the
Cesium atom is taken as equal to one __________.
(second, minute, hour)
23. The ampere is the unit of __________.
(time, electric current)
24. Mole is the amount of substance of a system which contains as many elementary
entities as there are atom in 0.012 kg of __________.
(Cesium – 133, Uranium – 298, Carbon – 12)
25. The dimension of volume is __________.
(L2, L-2, L3)
26. The dimension of velocity is __________.
(LT-2, L-1L2, LT-1)
27. The dimension of linear momentum is __________.
(MLT-1, ML-1T, M-1LT)
28. The number of 6408.2 has __________ significant figure(s).
(one, four, five)
29. The circumference of a circle of radius 3.5 cm is __________.
(21.99cm, 38.49 cm,179.62 cm)
30. The volume of a sphere of radius 3.5 cm is __________.
(21.99 cm3, 38.49cm3, 179.62cm3)
31. Al Khawarizmi was the founder of __________.
(Decimal system, Geomtery, Analytical Algebra)
32. A number, which is reasonably reliable, is called __________.
(Ratio, Function, Significant Figure)
33. Electromagnetic wave theory of light is proposed by __________.
(Maxwell, Newton, Huygen)
34. Wave mechanics were introduced by __________.
(De-Broglie, Maxwell, Newton)
35. Natural Radioactivity was discovered by __________.
(Madam Curie, Bacquerel, Max-Plank)
Chapter 2
Scalars and Vectors
1. Physical quantity, which can be completely specified by its magnitude only, is called
__________.
(Scalars, Vectors, None of above)
2. Physical quantity, which can be completely specified by its magnitude as well as
direction, is called __________.
(Scalars, Vectors, None of Above)
3. Two or more than two scalars measured in the same system of units are equal only if
they have the __________.
(Same Magnitude, Same magnitude and direction, Same direction)
4. Vectors are denoted by __________.
( or a, b, c)
5. Magnitude of vectors is denoted by __________.
( or a, b, c)
6. Two vectors are equal without any consideration of their initial point only if they
have __________.
(Same magnitude, Same magnitude and similar direction, Same direction)
7. The tail end of a vector line is called __________.
(Initial point of the vector, terminal point of the vector, final point of the vector)
8. The magnitude of a vector is always treated as __________.
(Negative, Non-Negative, Negative and Positive both)
9. In parallelogram law of vector addition the resultant of the vector is represented by
__________.
(Diagonal of the parallelogram, any adjacent side of the parallelogram, opposite side of the parallelogram)
10. Law of cosine is normally used to determine the __________.
(Magnitude of resultant, direction of resultant, both magnitude and direction of the resultant)
11. The product of number “m” and vector generates a new vector . The magnitude
of the product is represented by __________.
(B = |m|A, A = |m|B, |m| = BA)
12. Law of Sine is normally used for determination of __________.
(Magnitude of resultant, Direction of Resultant, Both Magnitude and Direction)
13. m = m is governed by __________.
(commutative law for multiplication, Associative law for multiplication, Distributive law for multiplication)
14. m = (mn) is governed by __________.
(Commutative law for multiplication, Associative law for multiplication, Distributive law for multiplication)
15. (m + n) = m = n follows __________.
(Commutative law, Associative Law, Distributive Law)
16. The division of a vector by a positive number n is given by = |m| where m =
1/n the direction of is __________.
(same as , oppoosite to , parallel to itself)
17. The division of vector by a negative number n is given by = |m| where m =
1/n the direction the is __________.
(same as , oppoosite to , parallel to itself)
18. A unit vector is represented by __________.
( , , )
19. The unit vectors are __________.
(parallel to each other, perpendicular to each other, none of the above)
20. The sum of rectangular components vector produces the original vector, which is
represented by __________.
21. The magnitude of vector is given by __________.
, , )
22. The dot product of unit vectors and is equal to __________.
(i, , )
23. The dot product of unit vectors and is equal to __________.
(
24. The cross product of unit vector and is equal to __________.
(0, 1, )
25. The vector product of and is ___________.
(- , , r)
26. A vector which can be displaced parallel to it self and applied at any point is known
as __________.
(Null vector, Free Vector, Position Vector)
27. A vector, which can represent the position of a point with respect to some fixed point
in coordinate system, is called __________.
(Null Vector, Free Vector, Position Vector)
28. If two vectors which are equal in magnitude but opposite in direction, their
combination produces __________.
(Null Vector, Free Vector, Position Vector)
29. The horizontal component of vector is given by __________.
(A cos q, A sin q, A tan q)
30. The vertical component of vector is given by __________.
(Acosq, Asinq, Atan)
31. The product of magnitude of two vectors and cosine of the angle between them is
called __________.
(Scalar Product, Vector Product, None of the above)
32. The product of magnitude of two vectors and sine of the angle between them is called
__________.
(Scalar Product, Vector Product, None of the above)
33. If and are the two vectors then __________.
34. Two or more vectors are added by __________.
(Head to tail rule, simple addition, none of these)
35. The angle between the horizontal and vertical component of a vector is __________.
(90°, 0°, 180°)
36. If the resultant of two forces of magnitude 3N and 4N is 5N then the angle between
these two forces is __________.
(0°, 45°, 90°)
37. The dot product of two vectors is zero when they are __________.
(In the same Direction, Perpendicular to each other, In the opposite direction)
38. If the cross product of two vectors is zero they are __________.
(Parallel to each other, Perpendicular to each other, Opposite in direction)
39. If are __________.
(Parallel to Each other, either A or B is a null vector, perpendicular to each other)
40. The cross product of two vector is a __________.
(Scalar, Vector, None of these)
Chapter 3
Motion
1. The change of position of a body in a particular direction is called its __________.
(Displacement, Velocity, Acceleration)
2. The change of displacement with respect to the time is called __________.
(Speed, Velocity, Acceleration)
3. The rate of change of position in a particular direction is called __________.
Displacement, Velocity, Acceleration)
4. The total change in displacement divided by the total change in time of body is
called its __________.
(Average Velocity, Instantaneuous Velocity, Uniform Velocity)
5. The change of displacement in a very small interval of time (time tends to zero) of a
body is called its __________.
(Average Velocity, Instantaneous Velocity, Uniform Velocity)
6. When a body undergoes an acceleration then __________.
(Its speed increases, Its velocity increases, It falls toward the earth)
7. A force acts on a body that is free to move. We known that magnitude and direction
of the force and the mass of the body. Newton’s second law of motion enables us to
determine the body’s __________.
(Acceleration, Speed, Velocity)
8. A hole is drilled through the earth along the diameter and a stone dropped into it.
When the stone is at the centre of the earth it has __________.
(Mass, Weight, Acceleration)
9. A force of 3N acts perpendicularly to a force of 4N. Their resultant has magnitude of
__________.
(1N, 5N, 7N)
10. In __________ of the following examples the motion of the car not accelerated.
(Car turns a corner at constant speed of 29km/hr, Car climbs a steep hill with its speed dropping from 60
km/hr at the bottom to 15 km/hr at the top, Car climbs a steep hill at the constant speed of 40km/hr)
11. The algebraic sign of acceleration depends on __________.
(The choice of direction, Whether an object is speeding up or slowing down, The position of the object)
12. The acceleration due to gravity __________.
(has the same value every where in space, has the same value every where on the earth, varies with the
latitude on the earth)
13. Swimming is possible because of __________ law of motion.
(First, Second, Third)
14. A vehicle is moving horizontally at 30m/s. It is then accelerated uniformly in the
same direction at 0.5 m/s2 for 30 seconds. Its final speed is __________.
(180 m/s, 45.0 m/s, 90 m/s)
15. An object falls freely from rest with an acceleration of 10m/s2 (approximately).
Then the distance traveled after 0.6 second is __________.
(1.8 m, 18.0 m, 3.6 m)
16. A trolley of mass 1.0kg travelling at 3m/s, collides with second trolley which is
stationary. On collision the two trolley join together and continue to travel in the
original direction with a common speed of 1.0 m/s. __________is the mass of second
trolley.
(0.33kg, 0.67kg, 2.0kg)
17. A steel ball is dropped in a viscous fluid. It will __________.
(move down with uniform velocity, remain stationary, fall with uniform acceleration of 9.8 m/s2)
18. A trolley of mass 2kg moves with constant acceleration on a smooth horizontal
surface. Its speed changes from 4m/s to 16 m/s during 6.0 seconds. The trolley has an
acceleration of __________m/s2.
(0.5 , 0.66, 2)
19. During a stop a car comes to rest from a speed of 10 m/s in 5 seconds. Assuming a
steady deceleration during this time, it will travel a distance of __________.
(2m, 10m, 25m)
20. A ball is dropped from a tall building falls to the ground. Ball reaches the ground in
3.0 seconds. __________ is the height of the building.
(15m, 30m, 45m)
21. A trolley of mass 2kg is moving at 15m/s. It collides head on with another trolley of
mass 1kg initially at rest. The first trolley sticks with second one. __________ is the
speed of both trolleys after collision.
(5m/s, 7.5m/s, 10m/s)
22. When a tennis ball is allowed to fall freely in air toward the ground. It is found that
it acquires a uniform velocity. This is because the __________.
(Weight of the ball does not act beyond a certain speed, Upthrust of the displaced air supports the ball,
Frictional force caused by the air increases with speed)
23. The force required to accelerate mass of 1kg at 1.0 m/s2 is __________.
(1N, 10N, 100N)
24. If a stone falls from rest with a uniform acceleration of 10m/s2 (approximately) then
__________.
(It falls equal distance in successive seconds, it falls 10.0 m during the first second, its speed increases by
10 m/s each second)
25. The frictionless trolley is moving horizontally at 30m/s. It is then accelerated
uniformly in the same direction at 0.5 m/s2 for 30.0 seconds. The final speed is
__________.
(15 m/s, 45 m/s, 75 m/s)
26. A person covers half of its journey at a speed of 40 m/s and the other half at 50 m/s.
His average speed during the whole journey is __________.
(45 m/s, 46 m/s, 48 m/s, 44.1 m/s)
27. An object is thrown vertically upward with a velocity of 40 m/s and returns after
some time into the thrower’s hands with the same velocity. Average velocity during
the whole movement is __________.
(40m/s, 60m/s, 80 m/s, 0)
28. A body starts from rest and moves with uniform acceleration of 10m/s2 in the first 10
seconds. During the next 10 seconds it moves with uniform velocity attained. The
total distance covered by it is __________.
(200m, 1000m, 1500m, 500)
29. A ball A dropped from the top of a building while another ball B is thrown
horizontally at the same time. The ball strikes the ground is __________.
(Ball A, Ball B, Both strikes simultaneously)
30. __________ of the following is one dimensional motion.
(The wheels of a moving train, the earth revolving round the sun, A train running on a straight track)
31. A body has an initial velocity of 8 m/s. After moving 4m its velocity is 12 m/s. The
acceleration is __________m/s2.
(10, 100, 4)
32. A body starting from rest travels 120 m in 8th second. Assuring the motion to be
uniform, its acceleration is __________m/s2.
(15, 16, 10)
33. A body thrown vertically up with a velocity of 10m/s, comes back in to the hand of
the thrower after 4 seconds. Height attained by the body is __________. (Take g =
10m/s2)
(10m, 5m, 15m)
34. The total change in velocity of a body divided by the total time is called
__________.
(Average acceleration, Instaneous Acceleration, Uniform Accelration)
35. The change in velocity of a body in a very small interval of time (time interval tends
to zero) is called __________.
(Average acceleration, Instantaneous Acceleration, Uniform Acceleration)
36. When there is equal change in velocity in equal intervals of time, then acceleration is
called __________.
(Average Acceleration, Instantaneous Acceleration, Uniform Acceleration)
37. Force is that agent which produces or tends to produce the __________.
(Speed in the body, Acceleration in the body, Constant velocity in the body)
38. Whenever a constant force is applied on a body then it will move with __________.
(Cosntant Speed, Constant Velocity, Constant Acceleration)
39. The direction of tension in string will always in the __________.
(Same direction of applied force, Opposite direction of applied force, None of the above)
40. A body of mass 10kg is suspended by a string, the tension produced in the string is
__________. (Take g = 10m/s2)
(100N, 9.8 N, 980 N)
41. In elastic collision between the two bodies __________.
(Only mometum of the system is conserved, Only the kinetic Energy of the system is conserved, Both the
kinetic Energy and Momentum of the system remain the same)
42. In inelastic collision between the two bodies __________.
(Only mometum of the system is conserved, Only the kinetic Energy of the system is conserved, Both the
kinetic Energy and Momentum of the system remain the same)
43. If a lighter body collides elastically with a massive body at rest then the lighter
bodies will __________.
(Rebound, Come to rest, Start to move with a velocity double of its initial)
44. The kinetic friction will always be __________.
(Greater than the static friction, Equal to the Static Friction, Less than the static Friction)
45. The unit of coefficient of friction in SI system is __________.
(Newton, Dyne, None of These (No Unit))
46. Due to the rise in temperature the coefficient of fluid friction will __________.
(Decrease, Increase, Remain the same)
47. A body of mass ‘m’ slides down a frictionless inclined plane making an angle q with
the horizontal then __________ of the following statement is most appropriate.
(The component of its weight normal to the plane pulls it down the plane, The component of its weight
parallel to the plane is balanced by the normal reaction of the plane, The body moves down the plane with
a constant acceleration)
48. If a weight of 1 kg and 1gm are dropped from the same height simultaneously then
__________.
(1kg will reach the ground earlier, 1gm weight will rach the ground earlier, bother will reach the ground at
the same time)
49. If the velocity of the body is uniform then __________.
(Its speed remains uniform, Its speed and direction of motion will remain the same, Its acceleration is
uniform)
50. If a particle is moving with constant speed in a circle then its velocity is
__________.
(Zero, Uniform, Variable)
Chapter 4
Motion in Two Dimensions
1. The motion of a body along a straight line is called __________.
(Linear Motion, Angular Motion, Vibratory Motion)
2. The motion of a body along a curved path is called __________.
(Linear Motion, Angular Motion, Vibratory Motion)
3. The example of motion of the body in two dimensions is __________.
(Ball moving along a straight line, Progectile, Train moving along a straight track)
4. In projectile motion the object is purely under the influence of __________.
(Centripetal Force, Force of Gravity, Restoring Force)
5. In projectile motion (freely falling bodies) sign assigned to the acceleration due to
gravity (g) will always be __________.
(Positive, Negative, None of these)
6. In considering the projectile motion all the vectors like, velocity and displacement
along positive y-axis will be taken as __________.
(Positive, Negative, None of these)
7. During the projectile motion, the vertical component of a velocity __________.
(Changes, remains the same, None of these)
8. During the projectile motion, the horizontal component of the velocity __________.
(Increases, Remains the same, Decreases)
9. The path of the projectile is __________.
(Parabolic, Hyperbolic, Elliptical)
10. During the projectile motion the acceleration along the horizontal direction will
__________.
(Decrease, Increase, be Zero)
11. In projectile the acceleration along vertical direction will __________.
(Decrease, Increase, Remain the same)
12. The expression for the time to reach the maximum height of the projectile is
__________.
(Vosinq/g, 2Vosinq/g, Vosinq/2g)
13. The expression for the total time of flight of the projectile is __________.
(Vosinq/g, 2Vosinq/g, Vosinq/2g)
14. The expression for maximum height reached by the projectile is __________.
(Vo2sin2q/g, Vosin2q/2g, Vo2sin2q/2g)
15. The expression for the horizontal range of the projectile is __________.
(Vo2sin2q/g, Vosin2q/g, Vo2sin2q/2g
16. The expression for the maximum range of the projectile is __________.
(Vo2/g, Vosin2q/2g, Vosinq/2g)
17. For the maximum range of the projectile the angle of elevation must be __________.
(0°, 45°, 90°)
18. The horizontal range of the projectile is directly proportional to the __________.
(Initial Velocity, Square of the initial velocity, Square root of the initial velocity)
19. The horizontal range of the projectile is directly proportional to the __________.
(sine of the angle of elevation, sine of the twice of the angle of elevation, square of the sine of the angle
of elevation)
20. The expression for the trajectory of the projectile is __________.
(ax – ½ bx2, a/x – bx2/2, ax – bx2)
21. In projectile motion the small angle of elevation produces __________.
(Flat Trajectory, High Trajectory, Low trajectory)
22. In projectile motion the large angle of elevation produces __________.
(Flat trajectory, Low Trajectory, High trajectory)
23. If the angle of elevation of the projectile is 90° then its horizontal range will be
__________.
(Minimum, Zero, Maximum)
24. For the projectile with high trajectory their time of flight will be __________.
(Short, Long, None of these)
25. For the projectile with low trajectory, their time of flight will be __________.
(Short, Long, None of these)
26. If a projectile has some horizontal range at an angle of elevation of 15° then its
range will be the same when the angle of elevation is equal to __________.
(30°, 45°, 75°)
27. At maximum height, the vertical component of the velocity of the projectile is
__________.
(Minimum, Zero, Maximum)
28. Horizontal motion with constant velocity and vertical motion with constant
acceleration is called __________.
(Rectilinear Motion, Projectile Motion, Circular Motion)
29. A ball is thrown horizontally from a height of 400m with a muzzle velocity of
100m/s. It experiences a horizontal acceleration equal to __________.
(50m/s2, 9.8 m/s2, zero)
30. If a shell is fired with the velocity of 9.8 m/s at an angle of 45° then its horizontal
range will be __________.
(Zero, 4.9m, 9.8m)
31. A projectile is fired horizontally with an initial velocity of 20m/s. after 3 seconds its
horizontal component of velocity is __________.
(60m/s, 6.67,20 m/s)
32. In projectile motion __________ of the following angle will result the maximum
range.
(20°, 45°, 60°)
33. An aeroplane moving horizontally with a velocity of 100m/s, drops a food packet
while flying at a height of 490m. The packet will strike the ground from the point
just vertically below the point of the projection at a distance of __________.
(980m, 1000, 1960 m)
34. The ball A is dropped from the top of a building simultaneously the ball B is thrown
horizontally then __________.
(ball A strikes the ground first, ball B strikes the ground first, both ball A and B will strike the ground
simultaneously)
35. If the launch angle of a locust is 55° and its range is 0.8 m then the take off speed of
a locust is __________.
(2 m/s, 2.9 m/s, 3.9 m/s)
36. __________ should be the initial velocity of a rocket if it to hit a target 1000 km
away.
(3130.5 m/s, 313.5 m/s, 31.35 m/s)
37. If an object is moving with constant speed along a circle then its motion is
__________.
(Linear, Vibratory, Uniform Circular)
38. The expression for the time period of an object moving with constant speed v along
a circle of radius r is given by __________.
(4pr/v, 2pr/v, pr2/v)
39. The angle subtended by an object with the centre of the circle when its is moving
from one point to another on its circumference is called __________.
(Angular Displacement, Angular Speed, Angular Acceleration)
40. The unit of angular displacement in system of measurement is __________.
(Radian, m/s, rad/s)
41. The central angle subtended by an arc whose length is equal to the radius of the
circle is equal to one __________.
(Radian, Degree, Gradient)
42. The relation linear (s) and angular (q) displacements is given by __________.
(s = rq, s = r/q, q = sr)
43. In the relation s = rq, q will always be measured in __________.
(Degrees, Radian, None of these)
44. One radian is equal to __________.
(5.73 degrees, 57.3 degrees, 53.7 degree)
45. One degree is equal to __________.
(0.017 rad, 17.45 rad, 1.74 rad)
46. The angular displacement or shift per unit time is called __________.
(Angular Speed, Angular Velocity, Angular Acceleration)
47. One revolution is equal to __________.
(2p rad, p/2 rad, 4p rad)
48. 1 radial is equal to __________.
(2prevolution, p/2 rad, p1/2 revolution)
49. The direction of angular velocity is always along the axis of rotation and it can be
determined by __________.
(Head to tail rule, Right hand rule, None of these)
50. If an object is rotating in the counter-clockwise direction then the direction then the
direction of angular velocity is __________.
(Into the plane, Out of the plane, None of these)
51. If a particle with instantaneous linear velocity ‘v’ is rotating along the circumference
of circle of radius ‘r’ then the relation between angular velocity (w) and its linear
velocity (v) is given by __________.
(v = w/r, v = rw, w = vr)
52. If a particle covers equal angular displacement in equal interval of time then its
angular velocity is __________.
(Variable, Uniform, Average)
53. The rate of change of angular velocity is called __________.
(Angular Displacement, Angular Acceleration, None of these)
54. The unit of angular acceleration in SI system is __________.
(deg/s2, m/s2, rad/s2)
55. The relation between linear acceleration (a) and angular acceleration (a) of a particle
is given by __________.
(a = ra, a = a/r, a = ar)
56. The velocity of the particle tangent to its circular path is called __________.
(Angular Velocity, Uniform Angular Velocity, Tangential Velocity)
57. In circular motion the time period and angular velocity of a particle are __________.
(Directly proportional to each other, Inversely proportional to each, none of these)
58. If a particle is moving with constant speed along the circumference of a circle then
the acceleration possessed by the particle is __________.
(Linear Acceleration, Centripetal Acceleration, None of these)
59. The direction of centripetal acceleration will always be __________.
(Towards the centre of the circle, Aways from the centre of the circle)
60. The force, which produces the centripetal acceleration, is called __________.
(Centrifugal Force, Gravitational Force, Centripetal Force)
61. The expression for centripetal acceleration is given as __________.
(v/r, v2/r, r2w)
62. The expression for centripetal acceleration in terms of time period (T) is given as
__________.
(4pr2/T, 4pr/T, 4p2r/T2)
63. The force, which keeps the body in circular motion and always directed towards the
centre of the circle is called __________.
(Force of Gravity, Centripetal Force, Centrifugal Force)
64. The acceleration of the body or particle tangent to the circular path is called
__________.
(Centripetal Acceleration, Tangential Acceleration, None of these)
65. In circular motion the tangential component of acceleration arises when
__________.
(speed of the object is changed, speed of object is constant, direction of motion of the object is changed)
66. In circular motion the centripetal component of acceleration arises when
__________.
(speed of the object is changed, speed of the object is constant, direction of motion of object is changed)
67. Centripetal acceleration and tangential acceleration are always __________.
(Parallel to Each other, Perpendicular to each other, None of thse)
68. A car is travelling at a constant speed of 20m/s rounds a curve of radius 100m. What
is its acceleration.
(2m/s2, 3m/s2, 4m/s2)
69. If the speed of the object moving in a circle is doubled then centripetal force
__________.
(Remains the same, Becomes half of its initial value, Becomes from times than its initial value)
70. When an object moves round the circular track, the centripetal force is provided by
__________.
(Force of Gravity, Fictious Force, Frictional Force)
Chapter 5
Torque, Angular Momentum and Equilibrium
1. Troque is defined as __________.
(Time rate of change of angular momentum, Time rate of change of linear momentum, time rate of
change of angular velocity)
2. The vector quantity torque __________.
(Depends on the choice of origin, does not depend on the choice of origin)
3. Every point of rotating rigid body has __________.
(the same angular velocity, the same linear velocity, the same linear acceleration)
4. The right hand rule is applied to find __________.
(The direction, of a vector obtained by the vector product of two vectors, The magnitude of a vector
obtained in the above manner, neither the direction nor the magnitude)
5. Two forces, which form a couple __________.
(can be replaced by a single equivalent force, cannot be replaced by a single equivalent force, are
perpendicular to each other)
6. The direction of torque is __________.
(The same as the direction of the corresponding applied force, opposite to the direction of the applied
force, perpendicular to the direction of applied force)
7. The centre of mass of system of particles __________.
(coincides always with centre of gravity, never coincides always with the centre of gravity, coincides with
the centre of gravity only in a uniform gravitational field)
8. The moment of momentum is called __________.
(Couple, Torque, Angular Momentum)
9. Dimensions of moment of inertia are __________.
(M1L°T-1, M1L°T-1, M1L2T°)
10. The unit of moment of inertia is SI system is __________.
(kg/m, kg-m, kg-m2)
11. Radius of a ring is 2cm and its mass is 20g. Its M.I about an axis passing through its
centre and perpendicular to its plane is __________.
(10g – cm2, 80g – cm2, 20g - cm2, 40g – cm2)
12. If the distance of a particle from the axis of rotation is doubled, the moment of
inertia __________.
(Becomes half, Increases two times, increases four times, increases eight times)
13. The physical quantity, which produces angular acceleration, is called __________.
(Centripetal Force, Troque, Angular Velocity)
14. Torque of a force T = is a vector quantity. Its direction is determined by
__________.
(Right hand rule, Knowing the direction of F, Knowing the position of origin)
15. In rotational motion, the analog of force is __________.
(rotational inertia, moment of inertia, torque)
16. The term torque is synonymous with __________.
(Moment of force, Moment of inertia, Angular Momentum)
17. The product of force times the perpendicular distance between some point and the
line of action of the force is __________.
(the moment of inertia acting on the body, The moment of force about the chosen point, The angular
momentum of the body)
18. The magnitude of torque is equal to the product of the force and the moment arm.
The moment arm is __________.
(The distance between the point (point chosen), and the pointof action of the force, the maximum
distance between the point and the line of action of the force, The minimum (perpendicular) distance
between the pivot and the line of action of the force)
19. If the direction of the applied force is reversed then __________.
(Its torque remains unchanged, the magnitude of its torque changes and direction of the torque remains
the same, The magnitude of its torque remains the same but the direction of the torque reverses)
20. If the directions of are reversed then __________.
(The magnitude and direction of the torque remain unaltered, the magnitude of the torque changes but
direction remains unchanged, the magnitude of the torque does not change but direction reverses)
21. A couple consists of __________.
(Two equal and opposite forces acting at a point on a body, two equal and parallel forces acting at a point
on a body, two equal and antiparallel forces acting at two different points on a body)
22. The arm couple is __________.
(The smallest distance between two equal and antiparallel forces, The greates distance between two equal
and antiparallel forces, The lines of action of two equal and opposite forces)
23. The units of torque and couples are __________.
(N-m and N-m2 respectively, N-m2 and N-m respectives, N-m for both)
24. A pair of forces equal in magnitude and opposite in direction with non-coincident
lines of action is known as __________.
(A couple, A Moment of Force, A Null Vector)
25. The centre of gravity of an object is __________.
(The foce of gravity on the object, The point about which the object rotates, The point at which the total
weight of the objects acts)
26. The centre of gravity of a body a irregular shape lies __________.
(At its centre, At the surface of the body, At the intersection of medians)
27. During rotational motion, the mass of a body or system is considered to be
concentrated at a single distance from the axis (centre) of rotation. The distance is
called __________.
(The radius of Gyration, The centre of mass, The moment of inertia)
28. A force passing through the centre of gravity of a body __________.
(Results only in rotational motion, Results only in translational motion, holds the body in equilibrium)
29. In rotational motion, the analog of linear momentum is called angular
momentum . They are connected by relation __________.
( )
30. In rotational motion, the quantity, which plays the same role as the inertial mass in
rectilinear motion, is called __________.
(Inertia, Angular Momentum, Moment of Inertia)
31. The symbol that is used to represent rotational inertia or moment of inertia is
__________.
(W, l, R)
32. The angular momentum (L) can be expressed in terms of moment of inertia (l) and
angular velocity (w) as __________.
(L = lw, L = l w2, L = l/w)
33. The product of the rotational inertia about an axis and the angular velocity of a body
rotating about this axis is called __________.
(Moment of Inertia, Torque, Angular Momentum)
34. The moment of inertia or rotational inertial depends upon __________.
(Mass Distribution of the body about the axis of rotation, Mass of the body and its radius, Mass of the
body and its angular speed)
35. The time rate of change of angular momentum of a body is equal to __________.
(The applied force, The applied torque, The moment of inertia)
36. If no external torques act, the angular momentum of a body rotating about a fixed
axis in two dimension is __________.
(Variable, Constant, Not conserved)
37. The dimensions of angular momentum are __________.
(MLT-1, MLT-2, ML2T-1)
38. The SI of angular momentum is __________.
(kgmsec-1, kgm2sec-2, kgm2sec-1)
39. The turning effect of a force is called __________.
(Acceleration, Torque, Velocity)
40. If q is the angle between force and displacement vectors then the physical quantity
torque is mathematical expressed as __________.
(C = rFsinq, C = Frcosq, C = Frtanq)
41. The perpendicular distance from the axis of rotation of a body to the line of action of
a force is called __________.
(Moment Arm, Torque, Displacement)
42. If the moment arm of a force is zero, i.e. the line of action of a force is passing
through the pivot then the magnitude of the torque generated as such is __________.
(Zero, Clockwise, Anticlockwise)
43. The torque depends upon __________.
(Magnitude of force, Magnitude of Displacement, Magnitude of Force and Displacement)
44. The magnitude of torque will be zero if the angle between force and displacement is
__________.
(0°, 45°, 60°)
45. The first condition us is sufficient to establish the mechanical equilibrium
if __________.
(The body is spherically symmetric, The body is not deformable, The body may be considered as mass
point)
46. An extended body in equilibrium many be analyzed as if it is a particle provided that
__________.
(All the forces are concurrent, The lines of action of all forces meet in a common point, any of the above)
47. The condition for equilibrium of a particle is that the __________.
(Vector sum of all forces be zero, Acceleration be constant, Vector sum of the forces and torques be zero)
48. The particle moving with constant velocity may be __________.
(Changing in direction, Acceleration, In equilibrium)
49. Consider a body suspended from a ceiling by a single vertical cord. The weight of
the body is a force exerted by __________.
(By the body on the ceiling, By the body on the cord, By the earth on the body)
50. It is easier to turn a steering wheel with both hands than with a single hand because
__________.
(A couple acts on the wheel, Two equal and opposite forces act on the wheel, The wheel is more strongly
gripped)
Chapter 6
Gravitation
1. The acceleration due to gravity __________.
(Has the same value every where in space, has the same value every where on the earth, Varies with
latitude on the earth)
2. If a planet existed whose mass and radius were both twice that of the earth, then
acceleration due to gravity at its surface would be __________.
(4.9 m/s2, 19.6 m/s2, 2.45 m/s2)
3. When the space ship is at a distance equal to twice of the earth’s radius from its
centre then the gravitational acceleration is __________.
(4.9 m/s2, 19.6 m/s2, 2.45 m/s2)
4. A hole is drilled through the earth along the diameter and a stone is dropped into it.
When the stone is at the centre of the earth it has __________.
(Mass, Weight, Acceleration)
5. Newton’s law of universal gravitation __________.
(Can only be indirectly inferred from the behaviour of the planent, Can be directly verified in the
larboratory, is valid only with in the solar system)
6. The gravitational force between two bodies does not depend upon __________.
(Their separation, Product of their masses, The sum of their masses)
7. If the radius of the earth were to shrink by 1% while its mass remaining same, the
acceleration due to gravity on the earth surface would __________.
(Decrease, Remain the same, Increase)
8. Planets revolve round the sun due to __________.
(Mutual attraction and repulsion between the sun and the planets, Gravitational attraction between the
sun and the planets, Centripetal Force)
9. Force of mutual attraction of earth on the objects is called __________.
(Weight, Mass, Gravitation)
10. When a person goes down to the bottom of deep mine compared to his weight on the
surface then its weight will __________.
(remain same, Increase, Decrease)
11. The weight of an object at the pole is greater than at equator. This is because
__________.
(Gravitational pull is more at the poles, the shape of the earth, the attraction of the moon is maximum at
the earth’s surface)
12. On the surface of the moon the weight of a person __________.
(Increases, Decreases, Remains the same)
13. A spring balance is being used to weigh mass of 1kg in a lift. If the spring balance
reads 9N and the acceleration of free fall (g) = 10m/s2. The lift is __________.
(Ascending at 1m/s2, At rest, Descending at 1m/s2)
14. The acceleration of free fall on moon is about one sixth of its value on earth. If on the
earth a body has mass ‘m’ and weight ‘w’, then on the moon, mass and weight will be
respectively about __________.
(m/6 and w/6, m/6 and w, m and w/6)
15. Spring balance is used to measure __________.
(Mass of the object, Apparent weight of the object, None of the above)
16. A person whose weight is 120 pound on the earth, on the moon his weight will be
approximately __________.
(20 pound, 30 pound, 40 pound)
17. According to the law of gravitation the force of attraction between the two bodies is
directly proportional to the __________.
(Sum of the masses of the bodies, Product of their masses, Difference of their masses)
18. According to the Newton’s law of gravitation the force of attraction between the two
bodies is inversely proportional to the __________.
(distance between the two bodies, Square of the distance between the two bodies, none of the above)
19. The gravitational force between two bodies whose mass are m1 and m2 are placed at a
distance r from each other is __________.
( , , )
20. If the distance between two masses is doubled, the gravitational force between them
becomes __________.
(half of its original value, one fourth of its original value, four times of its original value)
21. The value of gravitational constant is __________.
(6.673 x 10-11 N-m2 /kg2, 7.673 x 10-11 N-m2 /kg2, 8.673 x 10-11 N-m2 /kg2)
22. The dimensions of gravitational constant are __________.
(L3M-1T-2, L2M2T-1, LM-2T-2)
23. The approximate value of the average density of the earth is __________.
(5.5 x 103 kg /m3, 6.5 x 103 kg /m3, 7.5 x 103 kg /m3)
24. The value of g varies with radius of Earth as it is __________.
(Inversely proportional to the radius of the earth, Inversely proportional to the square of the radius of the
earth, Directly proportional to the square of the radius of the earth)
25. Acceleration of the moon is about __________.
(2.272 x 10-3 m/s2, 2.272 x 103 m/s2, None of these)
26. The value of orbit radius of the moon is about __________.
(3.84 x 108 m, 3.84 x 105 m, 3.84 x 103 m)
27. The time taken by the moon to complete one revolution around the earth is
__________.
(2.36 x 106 seconds, 2.36 x 104 seconds, 2.36 x 108 seconds)
28. The gravitational force of attraction between two balls each of mass 100kg when they
are placed at a distance of 1m apart is __________.
(6.673 x 10-8 N, 6.673 x 10-11 N, 6.673 x 10-7 N)
29. The acceleration due to gravity decreases for a point above the surface of the earth
and for the same point below the surface of the earth with a __________.
(Faster rate, Slow rate, Same rate)
30. The value of the gravitational acceleration at a distance equal to the earth’s radius
above the earth’s surface is __________.
(9.8 m/s2, 4.9 m/s2, 2.45 m/s2)
31. The value of the distance from the centre of the earth when the gravitational
acceleration has one half the value it has on the earth’s surface __________.
(1.414 Re, 2Re, 0.5Re)
32. A person with a mass of 40kg is standing on a scale in an elevator. The elevator
moves upwards with a constant acceleration of 1.2 m/s2, then the weight of the person
as measured by him in the elevator is __________.
(340 N, 440N, 540N)
33. The sun exerts a force of attraction on the planets thus keeping them in their
__________.
(Radii, Orbits, State of motion)
34. Numerical value of the gravitational acceleration can also be estimated by knowing
the __________.
(Average Density of the Earth, Circular Motion, Mass of the earth)
35. A spring balance suspended from the ceiling of an elevator supports an object. The
magnitude and direction of acceleration, which would make the balance reading zero,
is __________.
(9.8 m/s2 downward, 9.8 m/s2 upward, none of these)
36. The earth traverses its circular orbit in 3.15 x 107 seconds, orbiting at an orbital
velocity of 2.9 x 104 m/s, then its orbit radius is __________.
(1.45 x 1011 m, 1.45 x 108 m, 1.45 x 106 m)
37. The artificial gravity is produced in a satellite to overcome the state of weightlessness
experienced by the astronaut by __________.
(Spinning it around its own axis, Increasing the orbital speed of it, Decreasing its orbital speed)
38. The expression for the frequency of rotation of the satellite to produce artificial
gravity is __________.
(1/2p Ög/R, 2p Ög/R, 1/2p ÖR/g)
39. If the mass of the earth becomes four times to its initial value then the value of g will
be __________.
(Equal to its initial value, Four times to its initial value, One fourth of its initial value)
40. The value of gravitation acceleration (g) on the surface of the planet of radius 105 m
and mass 10kg is __________.
(6.67 x 10-8 m/s2, 6.67 x 10-11 m/s2, 6.67 x 10-10 m/s2)
41. The acceleration due to gravity on the surface of the moon is about _________.
(One sixth the acceleration due to gravity on the surface of the Earth, One fourth the acceleration due to
gravity on the surface of the earth, double the acceleration due to gravity on the surface of the earth)
42. The mass of a planet and its diameter are three times those of Earth’s. Then the
acceleration due to gravity on the surface of the planet will be _________.
(One third on the Earth’s, half on the Earth’s, None of the above)
43. Acceleration due to gravity at the centre of the earth is _________.
(Zero, Maximum, None of these)
44. The equation, which gives the magnitude of centripetal acceleration of the moon, is
_________.
(4p2R/T2, 4pR/T2, 4p2R/T)
Chapter 7
Work, Enegrgy and Power
1. The dot product of force and displacement is __________.
(Work, Energy, Power)
2. When the force and displacement are parallel to each other, then work is
__________.
(Minimum, Maximum, None of These)
3. When the force and displacement are perpendicular to each other, then work is
__________.
(Minimum, Maximum, None of these)
4. When the force and displacement are in the opposite direction then the work is
__________.
(Positive, Negativem, Zero)
5. The cross product of force and moment arm is __________.
(Work, Power, None of these)
6. Work is certainly done, if a body __________.
(Uses some energy, Covers some distance, Covers some displacement)
7. One electron volt is equal to __________.
(1.6 x 10-19J, 1.6 x 10-18J, 1.6 x 1019J)
8. One joule is equal to __________.
(103erg, 107erg, 10-3erg)
9. The dot product of force and velocity is called __________.
(Work, Power, Energy)
10. Power is a __________.
(Scalar Quantity, Vector Quantity, None of these)
11. Work done by a variable force is equal to __________.
( where Ddi is small, where Ddi is large, None of these)
12. A man does the work if he __________.
(Goes to fifth floor of the building, Goes to fifth floor of the building and comes back to ground floor,
remains on the ground floor)
13. One horsepower is equal to __________.
(550ft.lb/s, 746 ft.lb/s, None of these)
14. Law of conservation of energy is equivalent to __________.
(Law of conservation of mass, Law of conservation of momentum, None of these)
15. The expression for the absolute potential energy of mass m at the earth surface is
given as __________.
(mgh, GmMe/Re, GmMe/Re2)
16. Work done on a body is equal to __________.
(P.t, P/t, F/A2)
17. In a tug of war, team A is slowly giving way to the team B, then __________.
(Team A is doing negative work, Team A is doing positive work, team A is not doing work)
18. Kinetic energy of an object __________.
(Is independent of the direction of velocity, Depends on the direction of velocity, Is a scalar quantity)
19. Work energy equation is simply __________.
(Law of conservation of mass, Law of conservation of energy, none of these)
20. Work done by a grass cutter is maximum when he pulls it __________.
(Making an angle 45° with the floor, Making an angle of 90° with the floor, Along a line parallel to the floor)
21. A car covers some distance without any acceleration in it, then __________.
(Engine did some positive work, Engine did some negative work, none of these)
22. A body lifts a block on to a table in time Dt. The work he did, depends upon
__________.
(Mass of the block, time, none of these)
23. The unit of power is __________.
(watt-hour, Joule-second, N-m/s)
24. The rate of change of momentum multiplies by displacement gives __________.
(Power, Pressure, Work)
25. A ball during its downward journey possesses __________.
(Kinetic Energy only, Potential Energy only, Both kinetic energy and potential energy)
26. Work done in the gravitational field __________.
(Is independent of the path followed, depends upon the path followed, none of these)
27. Work done in the gravitational field along a closed path is equal to __________.
(Zero, Maximum, none of these)
28. Einstein’s mass energy equation is __________.
(E = mc, E = mc2, E = m2c)
29. 1 kilowatt hour is equal to __________.
(3.6 x 106J, 6.3 x 106 J, None of these)
30. The tidal energy is due to the __________.
(Rotation of earth relative to moon, rotation of the earth around sun, none of these)
31. The dimensions of work are __________.
(ML2T-2, MLT-2, ML2T-1)
32. The dimensions of energy are __________.
(ML2T-2, MLT-2, ML2T-1)
33. The dimensions of power are __________.
(ML2T-2, ML2T-3, ML3T-2)
34. __________ of the following quantity is defined as rate expenditure of energy.
(Momentum, Power, Velocity)
35. Gravitational potential energy transform into kinetic energy if __________.
(Water evaporates, A train accelerates from rest along a horizontal track, A body falls from a table)
36. __________ of the following represents the energy lost by a 1 N weight in falling
through 1 m.
(0.10 J, 1 J, 10 J)
37. Watt may be defined as __________.
(Joule per coulomb, Joule per second, Newton meter)
38. __________ of the following does not convert one type of energy into another.
(Solar cell, Steam engine, Transformer)
39. __________ of the following has the same unit as that of potential energy.
(Acceleration, Momentum, Work)
40. Experiment shows that the average power of a man walking upstairs at an ordinary
pace is only about __________.
(0.22 kW, 0.33 kW, 0.55 kW)
41. A body whose mass is 40g finds that he can run up a flight of 45 steps each 16 cm
high in 5.2 sec. His power is __________.
(0.44 kW, 0.54 kW, 0.64 kW)
42. A person having a mass of 60kg exerts a horizontal force of 300N in pushing a 90 kg
object through a distance of 3m along a horizontal floor. The work done by this
person is __________.
(7000 Joules, 900 Joules, 1100 Joules)
43. __________ is the kinetic energy of 60 g bullet moving at a speed of 600 m/s.
(10,800J, 11,800J, 12,800J)
44. A ball of mass 2kg rolls from the top of a smooth slope which is 7 m high and 14 m
long to its bottom. The change in the gravitational potential energy is approximately
__________.
(137J, 139J, 141J)
45. A man weighing 600 N climbs 5m vertically upward in 8 seconds his rate of working
is __________.
(175watt, 275watt, 375watt)
Chapter 8
Wave Motion and Sound
1. If k is a positive constant __________ of the following expression represents simple
harmonic motion (x is the displacement of particle from mean position).
(Acceleration = kx, acceleration = -kx, acceleration = kx2, acceleration = -kx2)
2. If k and a are the positive constants and x is the displacement from equilibrium
position. __________ of the following expression represents S.H.M.
(Velocity = k (a2-x2), Velocity = Ök(a2 – x2),Velocity =Ök(x2 – a2), Velocity = k(x2-a2))
3. A bob of mass m is hanging from the end of an elastic spring and executing S.H.M
with a period T. If this mass is replaced by another bob of mass 2m, the new time
period of this system will be __________.
(T, 2T, Ö2T, T/2)
4. A bob of mass m is hanging from the end of an inelastic string is executing S.H.M
with a period T. If this bob is replaced by an other bob of double mass. The new time
period of this system will be __________.
(T, 2T, Ö2T, T/2)
5. __________ of is not true for S.H.M.
(Motion is Periodic, Elastic Restoring force must be present, System may possess inertia, Total Energy of
system is conserved)
6. A body is attached to the end of a spring is executing S.H.M. at the extreme position
its __________.
(Kinetic energy is maximum, Kinetic Energy is zero, Both kinetic and potential energy are zero, its velocity
is maximum)
7. The motion of the simple pendulum is __________.
(Always simple harmonic, may be simple harmonic, can never be simple harmonic, circular)
8. A body is executing S.H.M if __________.
(Its acceleration is proportional to displacement and directed away from mean postion, Its acceleration is
proportional to displacement and directed towards mean position, Its acceleration is zero, none of these)
9. A body is executing S.H.M at the mean position if __________.
(If its acceleration is maximum, its acceleration is zero, its velocity is zero, it posseses maximum potential
energy)
10. A body is executing S.H.M at the mean position if __________.
(Its acceleration is maximum, Its velocity is maximum, It possesses maximum potential energy, none of
these)
11. A body is executing S.H.M if __________.
(Its amplitude of motion remains constant, Its amplitude of motion may be constant, Its motion is not
periodic, its motion may be vibratory)
12. A body is executing S.H.M with force constant k with an amplitude ‘a’, when its
displacement is ‘x’. Its instantaneous K.E is represented by __________.
(1/2 k(x2-a2), ½ kx2, ½ k(a2-x2), A(k/m)
13. A simple pendulum is performing S.H.M with period T. If its length is doubled. The
new time period will be __________.
(2T, 0.5T, 2.5T, 1.414 T)
14. If we increase the length of simple pendulum its time period will __________.
(Increase, Decrease, Remain same, becomes infinite)
15. A simple pendulum that behaves as a seconds pendulum on earth. If it is taken to
moon. Where gravitational acceleration is one sixth that on earth. Its time period will
become __________.
(4seconds, 12seconds, 3.5 seconds, 4.9 seconds)
16. A particle is moving in a circular path with constant angular speed. The motion of its
projection along its any diameter is __________.
(Projectile, Translatory, Vibratory, Circular)
17. The trajectory of the bob of a vibrating simple pendulum after it has got suddenly
detached from the thread while passing through its mean position is __________.
(Straight Line, Circular, Parabolic, Hyperbolic)
18. A string stretched between two fixed points is vibrating in one segment. The
frequency generated is called __________.
(First overtone, fundamental Frequency, Second Harmonic, Normal Harmonic)
19. When the temperature of air rises, the speed of sound waves increases because.
(Frequency of the wave increases, both frequency and wavelength increases, Only wave length increases,
Neither frequency nor wavelength changes)
20. The angular speed of the second hand of a watch is __________.
(p/30 rad/s, 1 rad/s, prad/s, 2p rad/s)
21. Restoring force is always present in __________.
(Linear Motion, Circular Motion, Simple Harmonic Motion, Projectile Motion)
22. The frequency of vibration in string of sonometer under tension T is f. If the
vibrating length is halved, keeping tension constant, for the same wire, the frequency
becomes __________.
(2f, 12f, ½ f, 4f)
23. A simple pendulum is transported to moon its frequency of oscillation will
__________.
(Decreases, Increases, Remain constant, Become zero)
24. The pitch of note obtained by plucking a stretched string would be lowered by
__________.
(Increasing the tension of the wire, Plucking it more vigorously, reducing the length of the string,
wrapping a length of the fine wire round the string)
25. When pitch of a note is raised then __________.
(Frequency is decreased, Speed of sound is increased,
speed of sound is decreased, wavelength is increased)
26. __________ of the following must differ for a transverse and longitudinal wave
moving in the same direction.
(Wavelength, Frequency, Amplitude, direction of Vibration)
27. A spectator watching a cricket match sees the bat strikes the ball and hears the sound
of this about half a second later. This is because light waves and sounds waves have
a different __________.
(Amplitude, Frequency, Intensity, Speed)
28. In one medium a wave has a frequency of the wave length l and speed c, the waves
passes from this medium to another where its speed is 2/3c. In the second medium
the __________.
(frequency is still f and the wave length still l, frequency is still f, but wavelength is 2/3 l, the wavelength
is still l, but frequency is 2/3f, frequency is still f, but wavelenth is 3/2 l)
29. Dolphins can communicate by emitting sounds of frequency 150,000 Hz. If speed of
sound in water is 1500 m/s, the wavelength of these sounds will be __________.
(1 m, 0.1 m, 0.01 m, 0.001m)
30. The motion of the particles of air, when sound waves passes through it is
__________.
(Period, Circular, Is an example of Brownian motion, Motion will constant acceleration)
31. Two stringed instruments are playing notes of the same pitch, __________ of the
following must be same for these notes.
(Amplitude, Frequency, Length of String, quality)
32. A simple pendulum is performing simple harmonic motion (SHM) __________ of
the following will remain constant through out its motion.
(Acceleration of the bob, Its amplitude, Force on the bob, Velocity of the bob)
33. For a system to execute S.H.M, its must possesses __________.
(Only elasticity, Only inertia, Elasticity as well as inertia, Neither elasticity nor inertia)
34. A spring of force constant k is broken into two equal parts, then the force constant of
each part is __________.
(k/2, 2k, k/Ö2, k)
35. The SI unit for force constant are __________.
(N, Nm-1, Nm-2,Nm)
36. Time period of a simple pendulum is T. It is kept in a lift, which is accelerating
upward. The time period of the pendulum will __________.
(Increase, Decrease, Remain the same, First increase then decrease)
37. In the above question if the lift moves upwards with uniform velocity, its time period
will __________.
(Increases, Decreases, Remain the same, Nothing can be said)
38. In the question number 36, the lift falls freely. They the time period will
__________.
(Increase, Decrease, Remain the same, Become infinite)
39. A body is executing S.H.M of amplitude A. Its potential energy is maximum when it
displacement is __________.
(Zero, A/2, A, ±A)
40. Mass m is suspended from an elastic spring of spring constant k. The time period of
small oscillation is __________.
(2p Öm/k, 2p Ö2m/k, 2p Ök/m, 2p Ö2k/m)
41. The dimensional formula for spring constant k is __________.
(MT-3, MT-2, MLT-2MT-1)
42. In resonance condition the amplitude of oscillation is __________.
(Very small, Small, Very large, Large)
43. The SI unit of force constant is identical to that of __________.
(Pressure, Energy, Surface Tension, Force)
44. If the oscillations are highly damped, the amplitude of oscillation __________.
(Decreases with time, Increases with time, Remains constant with time, First increases then decreases)
45. The time period of a simple pendulum at the centre of the earth is __________.
(Zero, Infinity, Unity, Same as thaht at the surface of the earth)
46. In S.H.M the maximum acceleration is a and maximum velocity is b, its time period
is __________.
(2pb/a, 2pa/b, a/2pb, b/2pa)
47. In S.H.M the graph between force and displacement is __________.
(Parabolic, Hyperbolic, Exponential, Linear)
48. The tuning fork A is of a slightly higher frequency than a fork B. they are employed
to produce beats. On loading the fork A the frequency of beats will __________.
(Increase, Decrease, Remain the same, become zero)
49. Beats are the result of __________.
(Diffraction, Constructive Interference only, Destructive Interference only, Constructive and Destructive
Interference both)
50. The distance between two consecutive nodes of a stationary wave is __________.
(l, l/2, l/4, l/6)
51. The stem of a vibrating tuning fork is pressed against a tabletop. The duration of its
vibration __________.
(Increase, Decrease, Remains unchanged, Becomes infinite)
52. In a simple harmonic motion we have the conservation of __________.
(Kinetic energy, Potential energy, Total energy, Electrical energy)
53. The velocity of longitudinal vibrations in a solid depends on its __________.
(Rigidity Modulus, Bulk Modulus, Young’s Modulus, Poison’s Ratio)
54. In a simple harmonic motion __________ is constant.
(K.E is constant, amplitude is constant, phase is constant, P.E is constant)
55. When beats are produced by two travelling waves of nearly the same frequency then
__________.
(the particles vibrate simple harmonically with a frequency equal to the difference in the frequencies of the
two waves, the amplitude of vibration at any point changes simple harmonically with a frequency equal to
the difference in the frequencies of the two waves, The frequency of beats depends on the position, where
the beats are heard, the frequency of beats decreases as the time is passing_
56. When beats are produced by two travelling waves of same amplitude and of nearly
the same frequencies, then __________.
(The maximum loudness heard is two times thaht corresponding to each of the constituent waves, The
amximum loudness heard is four times thaht corresponding to each of the constituent waves, The
maximum loudness heard is the same as thaht of corresponding to eac