Physics questions
20027 published questions with worked solutions.
- A stationary source emits sound of frequency f_0=492 Hz. The sound is *reflected* by a large car *approaching* the source with a...
- A rocket is launched normal to the surface of the Earth, away from the Sun, along the line joining the Sun and the Earth. The Sun...
- A person measures the depth of a well by measuring the time interval between dropping a stone and receiving the sound of impact...
- The instantaneous voltages at three terminals marked X, Y and Z are given by V_X=V_0 t, V_Y=V_0 ( t+ 2 3 ) and V_Z=V_0 ( t+ 4 3...
- The potential energy of a particle of mass m at a distance r from a fixed point O is given by V(r)=kr^2/2, where k is a positive...
- Consider a body of mass 1.0 kg at rest at the origin at time t=0. A force F =( t , i + , j ) is applied on the body, where =1.0...
- A uniform capillary tube of inner radius r is dipped vertically into a beaker filled with water. The water rises to a height h in...
- Two infinitely long straight wires lie in the xy-plane along the lines x= R. The wire located at x=+R carries a constant current...
- Two vectors A and B are defined as A =a , i and B =a ( t , i + t , j ), where a is a constant and = /6 rad s^ -1 . If | A + B |=...
- Two men are walking along a horizontal straight line in the same direction. The man in front walks at a speed 1.0 m ,s^ -1 and...
- A ring and a disc are initially at rest, side by side, at the top of an inclined plane which makes an angle 60° with the...
- Sunlight of intensity 1.3 kW ,m^ -2 is incident normally on a thin convex lens of focal length 20 cm. Ignore the energy loss of...
- A particle of mass m is initially at rest at the origin. It is subjected to a force and starts moving along the x-axis. Its...
- Consider a thin square plate floating on a viscous liquid in a large tank. The height h of the liquid in the tank is much less...
- In a radioactive decay chain, ^ 232 _ 90 Th nucleus decays to ^ 212 _ 82 Pb nucleus. Let N_ and N_ be the number of and ^-...
- In an experiment to measure the speed of sound by a resonating air column, a tuning fork of frequency 500 Hz is used. The length...
- A solid horizontal surface is covered with a thin layer of oil. A rectangular block of mass m=0.4 kg is at rest on this surface....
- A ball is projected from the ground at an angle of 45° with the horizontal surface. It reaches a maximum height of 120 m and...
- A particle, of mass 10^ -3 ,kg and charge 1.0 C, is initially at rest. At time t=0, the particle comes under the influence of an...
- A moving coil galvanometer has 50 turns and each turn has an area 2 10^ -4 m^2. The magnetic field produced by the magnet inside...