Physics questions
20027 published questions with worked solutions.
- A student performs an experiment to determine the Young's modulus of a wire, exactly 2 m long, by Searle's method. In a...
- A particle moves in the X-Y plane under the influence of a force such that its linear momentum is p(t) = A [ i (kt) - j (kt) ],...
- Positive and negative point charges of equal magnitude are kept at (0, 0, a 2 ) and (0, 0, -a 2 ), respectively. The work done by...
- Electrons with de-Broglie wavelength λ fall on the target in an X-ray tube. The cut-off wavelength of the emitted X-rays is
- STATEMENT-1 : If there is no external torque on a body about its center of mass, then the velocity of the center of mass remains...
- STATEMENT-1 : A cloth covers a table. Some dishes are kept on it. The cloth can be pulled out without dislodging the dishes from...
- STATEMENT-1 : The total translational kinetic energy of all the molecules of a given mass of an ideal gas is 1.5 times the...
- Two balls, having linear momenta p_1 = p i and p_2 = -p i, undergo a collision in free space. There is no external force acting...
- In a Young's double slit experiment, the separation between the two slits is d and the wavelength of the light is λ. The...
- A radioactive sample S1 having an activity of 5 µCi has twice the number of nuclei as another sample S2 which has an activity of...
- A vibrating string of certain length ℓ under a tension T resonates with a mode corresponding to the first overtone (third...
- STATEMENT-1 : For an observer looking out through the window of a fast moving train, the nearby objects appear to move in the...
- STATEMENT-1 : It is easier to pull a heavy object than to push it on a level ground. and STATEMENT-2 : The magnitude of...
- STATEMENT-1 : For practical purposes, the earth is used as a reference at zero potential in electrical circuits. and STATEMENT-2...
- STATEMENT-1 : The sensitivity of a moving coil galvanometer is increased by placing a suitable magnetic material as a core inside...
- A block of base 10 cm × 10 cm and height 15 cm is kept on an inclined plane. The coefficient of friction between them is 3 . The...
- A ball is dropped from a height of 20 m above the surface of water in a lake. The refractive index of water is 4/3. A fish inside...
- If the resultant of all the external forces acting on a system of particles is zero, then from an inertial frame, one can surely...
- A student performed the experiment of determination of focal length of a concave mirror by u-v method using an optical bench of...
- C_v and C_p denote the molar specific heat capacities of a gas at constant volume and constant pressure, respectively. Then