Physics questions
20027 published questions with worked solutions.
- An ideal gas is in thermodynamic equilibrium. The number of degrees of freedom of a molecule of the gas is n. The internal energy...
- The electric field associated with an electromagnetic wave propagating in a dielectric medium is given by E = 30(2 x + y ) [2 (5...
- A string of length 1 m and mass 2 10^ -5 kg is under tension T. When the string vibrates, two successive harmonics are found to...
- In a radioactive decay process, the activity is defined as A = - dN dt , where N(t) is the number of radioactive nuclei at time...
- A dimensionless quantity is constructed in terms of electronic charge e, permittivity of free space _0, Planck's constant h, and...
- An infinitely long wire, located on the z-axis, carries a current I along the +z-direction and produces the magnetic field B ....
- A block of mass 5 kg moves along the x-direction subject to the force F = (-20x + 10) N, with the value of x in metre. At time t...
- A particle of mass m is moving in a circular orbit under the influence of the central force F(r) = -kr, corresponding to the...
- The specific heat capacity of a substance is temperature dependent and is given by the formula C = kT, where k is a constant of...
- A point source S emits unpolarized light uniformly in all directions. At two points A and B, the ratio r = I_A/I_B of the...
- A particle of mass m is under the influence of the gravitational field of a body of mass M ( m). The particle is moving in a...
- A metal target with atomic number Z = 46 is bombarded with a high energy electron beam. The emission of X-rays from the target is...
- The dimensions of a cone are measured using a scale with a least count of 2 mm. The diameter of the base and the height are both...
- A ball is thrown from the location (x_0, y_0) = (0, 0) of a horizontal playground with an initial speed v_0 at an angle _0 from...
- A spherical soap bubble inside an air chamber at pressure P_0 = 10^5 Pa has a certain radius so that the excess pressure inside...
- A body of mass 10 kg is projected at an angle of 45° with the horizontal. The trajectory of the body is observed to pass through...
- A block of mass M slides down on a rough inclined plane with constant velocity. The angle made by the incline plane with...
- A block 'A' takes 2 s to slide down a frictionless incline of 30° and length ' ', kept inside a lift going up with uniform...
- The velocity of the bullet becomes one third after it penetrates 4 cm in a wooden block. Assuming that bullet is facing a...
- A steel wire of length 3.2 m (Y_s = 2.0 10^ 11 Nm^ -2 ) and a copper wire of length 4.4 m (Y_c = 1.1 10^ 11 Nm^ -2 ), both of...