Recently Active Physics Questions

in a simple pendulum the breaking strength of the string is double the weight of the bob. the bob is released from rest when string is horizontal. if the sting breaks when it makes an angle ∞ with the vertical. then find ∠...

*Image* plz explain in detail. ...

A ball is bouncing vertically up and down. It has a velocity v0 when it strikes the ground. The acceleration due to gravity is slowly reduced by 10% during a very long interval of time. Assuming no air resistance and perfectl ...

Two blocks A and B are attached to a spring of force constant K and are placed on a horizontal surface. The coefficient of friction between block A and surface is zero while between block B and surface is μ. A spherical ball ...

*Image* pls solve it.. ...

The electron in a hyrogen atom makes a transition from n1 -> n2=2. frequency of motion of electron in initial state is 1/27 of that the final state.Then find total no. of transition from n1 to ground state for the gas. ...

a-main scale divisions n-no of vernier divisions where n vernier scales coincide wid n-2 main scale divisions I.a=1mm n=20 II.a=0.5 mm, n=10 III.a=0.5mm , n=20 IV.a=1mm, n=100 find least count in each case. ...

A copper wire is held at the two ends by rigid supports.At 30°C. the wire is just taut with negligible tension.Find the approx. speed of transverse waves in this wire at 10°C( in m/s). Given ( Young's mod= 1.3*10^-4N/m^2) C ...

If resultant force on a system of particles must increase: then choose correct option: A the linear momentum of system must increase B the vel. of COM of system must increase C the distance of COM may remain constant from fix ...

pls solve it.. *Image* ...

*Image* wat is d answer?? ...

pls solve it.. *Image* ...

*Image* wat is d answer?? ...

what is d intensity of sound in SI units??? if loudness level is 220 db.. ...

the length of a needle floating on water is 2.5 cm. the min force in addition to its weight needed to lift the needle above water surface.(surface tension =0.072 MN/m) ...

A slab of glass of refractive index is surrounded by vacuum and is placed as shown. A light ray is incident at the point (2, 5 ) as shown. The point where the ray will cut the x axis is: ...

Two sound sources s1 and s2 of same frequency, are situated at a distance 2 m and 4 m from a point P respectively. At P the intensity of sound is 1 W/m2 if only source s1 is put on, and the intensity is 4 W/m2 if only source ...

You are provided a semi-infinite rod . Determine the dependance of its mass density with distance so that it satisfies the following property - If the rod is cut at an arbitrary position , the remaining semi-infinite piece wi ...

A three end toroid, containing an iron core, is connected into a circuit as shown in the figure. What will the current through switch K be right after closing the switch, if the initial current in the circuit was I0? (The ohm ...

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A given amount of (approximately ideal) gas is held in a spherical container. For what gas pressure the weight of the container will be minimal? ...

find the correct statements. If Frequency and Intensity of a light source are doubled.Then a)SAtURATioN photocurrent remains almost the same. b)Maximum Kinetic Energy of photoelectrons are doubled. ...

*Image* If the total energy of the particle is E, it will perform periodic motion only if : (A) E < 0 (B) E > 0 (C) V0 > E > 0 (D) E > V0 ...

Consider a particle moving in a circle performing non-uniform motion.Consider one revolution of the particle.In that revolution the net displacement is zero(you should use Fnet.d).So,net work done by the net force is zero.But ...

A small ball is thrown from a height of 15 m above the ground and at a horizontal distance d from a vertical wall.The ball first hits the wall and then strikes the ground and then it flies back to its initial position of thro ...

A ring as shown in the 'figure' is made up of two semi circular rings A and B of masses " 2 Kg " and " 4 Kg " respectively. The ring has diameter " 1 m ". If the Ring rolls without slipping, Find - *Image* 1. " Angular Accele ...

*Image* a vector along horizontal 'ma' i need its component up the incline,it can be done in two ways & i get two answers 'ma cos θ' and 'ma/cos θ' i was wondering which is correct and why ? ...

how can we prove that time period of compound pendulum is minimum when its length is equal to the radius of gyration about its centre of gravity... pls reply urgent... ...

Suppose a particle is moving along x- axis with constant velocity.A force F directed along y-axis starts acting on it.Just take the motion along y-axis of the particle.As particle accelerates along the y-direction its velocit ...

1) *Image* ------------------------------------------------------------------------------------------ 2)just a doubt.... *Image* *Image* my doubt is shud'nt it be 4 common tangents ??? ...