Physics questions
20027 published questions with worked solutions.
- A tiny spherical oil drop carrying a net charge q is balanced in still air with a vertical uniform electric field of strength 81...
- A diatomic ideal gas is compressed adiabatically to 1 32 of its initial volume. In the initial temperature of the gas is T_i (in...
- Image of an object approaching a convex mirror of radius of curvature 20 m along its optical axis is observed to move from 25 3 m...
- A large glass slab ( = 5/3) of thickness 8 cm is placed over a point source of light on a plane surface. It is seen that light...
- A police car with a siren of frequency 8 kHz is moving with uniform velocity 36 km/hr towards a tall building which reflects the...
- The wavelength of the first spectral line in the Balmer series of hydrogen atom is 6561 Å. The wavelength of the second spectral...
- A spherical metal shell A of radius R_A and a solid metal sphere B of radius R_B (< R_A) are kept far apart and each is given...
- An electron and a proton are moving on straight parallel paths with same velocity. They enter a semi-infinite region of uniform...
- A block is moving on an inclined plane making an angle 45^ with the horizontal and the coefficient of friction is μ. The force...
- Four point charges, each of +q, are rigidly fixed at the four corners of a square planar soap film of side 'a'. The surface...
- Steel wire of length 'L' at 40 °C is suspended from the ceiling and then a mass 'm' is hung from its free end. The wire is cooled...
- The activity of a freshly prepared radioactive sample is 10^ 10 disintegrations per second, whose mean life is 10^9 s. The mass...
- Four solid spheres each of diameter 5 cm and mass 0.5 kg are placed with their centers at the corners of a square of side 4 cm....
- A point mass is subjected to two simultaneous sinusoidal displacements in x-direction, x_1(t) = A t and x_2(t) = A ( t + 2 3 )....
- The density of a solid ball is to be determined in an experiment. The diameter of the ball is measured with a screw gauge, whose...
- A series R-C circuit is connected to AC voltage source. Consider two cases; (A) when C is without a dielectric medium and (B)...
- A train is moving along a straight line with a constant acceleration 'a'. A boy standing in the train throws a ball forward with...
- A silver sphere of radius 1 cm and work function 4.7 eV is suspended from an insulating thread in free-space. It is under...
- Three very large plates of same area are kept parallel and close to each other. They are considered as ideal black surfaces and...
- In the determination of Young's modulus (Y = 4MLg ld^2 ) by using Searle's method, a wire of length L = 2 m and diameter d = 0.5...