Recently Active Physics Questions

*Image* when the block moves on the horizontal block then work done against friction is W3... now when the block is moving on the left inclined plane, work done against friction is W1....similarly when it moves on the right i ...

Find time period of rod in both cases 1) *Image* Rod is hinged about centre...Distance a,b are measured from COM and c distance from point where string is tied 2) *Image* Rod is free to move,The strings are at extremes of rod ...

Q1) A man of height 2h stands in the middle of the room of length 6h. The height of the wall is 4h. What is the minimum length of a mirror to be placed on the wall in front of him so that he can see the entire wall behind him ...

1.Electric field intensity at a point depends upon a)Field Charge b) Test charge c) Permittivity of medium d) (Distance between point & test charge 2. Rydberg is used as unit of a) Wave no. b) Wave length c) Energy in atomic ...

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a block of wood floats in a bucket of water placed in a lift. Will the block sink more or less if the lift ... A)starts acclerating up B)moves up with a constant velocity.......please explain your answer...... ...

1. A loose thread is given a +Q charge. It immediately takes a circular shape. Why? 2. What is the increment in tension caused by placing a charge Qo at the centre of a uniformly charged ring of radius R? The ring has a unifo ...

*Image* The 50 kg homogenous smooth rests on the 30° incline and bear against the smooth vertical wall B. Find contact force at A? ...

A solid conducting sphere having a charge Q is surrounded by an uncharged concentric conducting hollow spherical shell. The potential difference between the surface of the solid sphere and the outer surface of the hollow shel ...

A solid conducting sphere having a charge Q is surrounded by an uncharged concentric conducting hollow spherical shell. The potential difference between the surface of the solid sphere and the outer surface of the hollow shel ...

The adjoining figure shows tracks of three charge particles 1, 2, and 3 in uniform electric field E Give the Signs of three charges. *Image* ...

A cage of 1.5 kg carries a bird of 2.5 kg inside it.when the bird starts flying in the cage the weight of the bird cage assembly is? a)4 kg b)1.5 kg c)2.5 kg d)2 kg ...

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1. By emission of which of the following element remains unchanged a) β^- decay b) γ decay 2. Two lens of power –15D and +5D are placed is contact co-axially. The focal length of equlvalent lens is (A) –10 cm (B) –20 ...

Draw and explain the output waveform across load resistor if input waveform is shown in fig *Image* ...

In youngs double slit experiment the distance between slits is d. The distance between slits and screen is a. With help of wavelength L no. of fringes observed per metre on screen will be?????? ...

1)3 particles of equal mass M are moving on a circular path with radius r under their mutual gravitational attraction.the speed of each particle is: a)√(GM/√2R) b)√(GM/√3R) c)√(GM/2R) d)√(GM/3R) 2)in a double star ...

*Image* a needle has been placed in each end of a broomstick,the tips of needles resting on the edges of a filled wine glass. the experimenter strikes the broomstick a swift blow with a stout rod .the broomstick breaks and fa ...

1.If the total number of neutrons and protons in a nuclear reaction is conserved, how then is the energy absorbed or evolved in the reaction ? Explain. 2. Compare the radii of two nuclel of mass numbers A1 & A2. ...

A converging and a diverging lens of equal focal lengths are placed co-axially in contact find the power and the focal length of the combination. ...

COL I 1. Frequency of LC Oscillation 2. Mean Circuit power 3. LCR series 4. LCR resonant series COL II a) Resistive circuit b) Impedance c) I^2 Zcos φ d) 1/2piundrtLC ...

(IIT 1984 - Multi ans correct) White light is used to illuminate the 2 slits in a Young's double slit experiment.The separation between the slits is b and the screen is at a distance d(>b) from the slits.At a point on the ...

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In an unconstrained elastic collision between two smooth balls moving along x-axis, velocity of the lighter ball changes from \vec{v} 1(before the collision) to \vec{v} 2 ( after collision). If \vec{v} is the velocity of cent ...

1. A- Amplitude modeulation can be obtained using a transistor R- There is need of positive feedback to obtain AM. 2. A- (For a prism of refracting angle 60º and refractive index, μ = underroot2 , the Minimum deviation is 3 ...

*Image* 1) A spring is resting inside a tumbler of liquid of density ρ..and a mass m of densityy d is just placed on the spring so that there is no expansion...as shown in the figure... now the mass is slowly descended into ...

A thin rod of length L is lying along the x - axis with its ends at x=0 and x= L . Its linear density (mass/length) varies with x as k(x/l)n where n can be zero or any positive number. If the position xCM of the centre of mas ...

(In a double slit expriment, the two cohunt beams have slightly different intensities I and I + lI (lI << I). Show that the resultant intersity at the maxima is nearly 4I while that at minima is (dI)^2/4I ...

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A spherical ball of radius R, is floating in liquid with the half of its volume submerged in liquid. Now the ball is displaced vertically by small distance inside the liquid. Find the frequency of oscillation of ball. (A) π/ ...