Physics questions
20027 published questions with worked solutions.
- In an X-ray tube, electrons emitted from a filament (cathode) carrying current I hit a target (anode) at a distance d from the...
- Two identical non-conducting solid spheres of same mass and charge are suspended in air from a common point by two...
- Starting at time t = 0 from the origin with speed 1 ms ^ -1 , a particle follows a two-dimensional trajectory in the x-y plane so...
- A spherical bubble inside water has radius R. Take the pressure inside the bubble and the water pressure to be p_0. The bubble...
- Two capacitors with capacitance values C_1 = 2000 10 pF and C_2 = 3000 15 pF are connected in series. The voltage applied across...
- A cubical solid aluminium (bulk modulus = -V dP dV = 70 GPa) block has an edge length of 1 m on the surface of the earth. It is...
- A container with 1 kg of water in it is kept in sunlight, which causes the water to get warmer than the surroundings. The average...
- A heavy nucleus Q of half-life 20 minutes undergoes alpha-decay with probability of 60% and beta-decay with probability of 40%....
- A particle of mass M = 0.2 kg is initially at rest in the xy-plane at a point (x = -l, y = -h), where l = 10 m and h = 1 m. The...
- An -particle (mass 4 amu) and a singly charged sulfur ion (mass 32 amu) are initially at rest. They are accelerated through a...
- A small object is placed at the center of a large evacuated hollow spherical container. Assume that the container is maintained...
- A source, approaching with speed u towards the open end of a stationary pipe of length L, is emitting a sound of frequency f_s....
- A physical quantity S is defined as S = ( E B )/ _0, where E is electric field, B is magnetic field and _0 is the permeability of...
- A heavy nucleus N, at rest, undergoes fission N P + Q, where P and Q are two lighter nuclei. Let = M_N - M_P - M_Q, where M_P,...
- The distance between two stars of masses 3M_S and 6M_S is 9R. Here R is the mean distance between the centers of the Earth and...
- In a photoemission experiment, the maximum kinetic energies of photoelectrons from metals P, Q and R are E_P, E_Q and E_R,...
- Two spherical stars A and B have densities _A and _B, respectively. A and B have the same radius, and their masses M_A and M_B...
- The minimum kinetic energy needed by an alpha particle to cause the nuclear reaction ^ 16 _ 7 N + ^ 4 _ 2 He ^ 1 _ 1 H + ^ 19 _ 8...
- At time t = 0, a disk of radius 1 m starts to roll without slipping on a horizontal plane with an angular acceleration of = 2 3...
- Consider an LC circuit, with inductance L = 0.1 H and capacitance C = 10^ -3 F, kept on a plane. The area of the circuit is 1...