List of top Physics Questions asked in KEAM

If the value of \(C_p/C_v\) is unity in the equation \(PV^\gamma = \text{constant}\), then the process is

The ratio of radius of gyration of a circular ring to that of a circular disc, each of same mass and same radius about their respective central axes is

Work done in a stretched wire is

Pick out the INCORRECT statement from the following

Two bodies of masses \(m\) and \(4m\) are kept at a distance of \(x\). The distance on the axial point from \(m\) at which the gravitational field is zero is

A shell travelling along a parabolic path in the gravitational field of the earth undergoes explosion in mid air. The centre of mass of the fragments will move

The total pressure \(P\) inside an air bubble of radius \(r\) at a depth \(h\) below the surface of liquid of density \(\rho\) is (T = surface tension of liquid, \(P_0\) = atmospheric pressure)

An object when dropped from a height \(h\) from the ground, reaches the ground in \(t\) s. The time after which the object was passing through a point at a height \(h/2\) from the ground is

Three forces \(F_1, F_2\) and \(F_3\) acting on a body of mass \(m\) keep the body stationary. If the forces \(F_1\) and \(F_2\) are mutually perpendicular, the acceleration of the body when the force \(F_3\) is removed is

A person standing on the platform of a lift will experience weight loss, when the lift moves

A body initially at rest undergoes linear motion with constant acceleration under the action of a constant force. Then the power delivered to the body at time \(t\) is proportional to

The angle between two unit vectors \(\vec{A}\) and \(\vec{B}\) is \(60^\circ\). The value of \(|\vec{A} - \vec{B}|\) is

The reverse biasing in a junction diode,

The half-life periods of two radioactive materials A and B are 1500 years and 1200 years respectively. If their mean life periods are \( \tau_A \) and \( \tau_B \) respectively, then the value of the ratio \( \frac{\tau_A}{\tau_B} \) is

In Young's double slit experiment, the band width of the fringes observed is \( \beta \), when light of wavelength \( \lambda \) is used. With same experimental set up, to double the band width of the fringes, the wavelength of light required is

An alternating voltage of \( 250\,\text{V},\,50\,\text{Hz} \) is applied to a full wave rectifier. If the internal resistance of each diode is \( 10\,\Omega \) and the load resistance is \( 5\,\text{k}\Omega \), the peak value of output current is

The greatest wavelength of the radiation that will ionize unexcited hydrogen atom is

Pick out the INCORRECT statement from the following:

An alternating current having the peak value \( 10\sqrt{2}\,\text{A} \) is used to heat a metal wire. To produce the same heating effect, the constant current required is

The self-inductance of an air core solenoid is \( L \). If the number of turns in the solenoid is doubled, keeping all other factors constant, then its self-inductance will be

If \( v_g, v_X \) and \( v_v \) are the speeds of gamma rays, X-rays and visible light respectively in vacuum, then

The Brewster's angle \( i_B \) for any interface should lie between

When a ray of light moves from one medium to another medium,

The dependence of drift velocity \( v_d \) on the electric field \( E \), for which Ohm's law is obeyed is

When \( n \) identical cells are connected in parallel,