List of top Physics Questions asked in KEAM

A stationary body of mass 5 g carries a charge of 5 $\mu$C. The potential difference with which it should be accelerated to acquire a speed of 10 m/s is:
Bohr atom model is invalid for:
A steady current of 2 A is flowing through a conducting wire. The number of electrons flowing per second in it is:
In moving a body of mass \( m \) down a smooth incline of inclination \( \theta \) with velocity \( v \), the power required is (g = acceleration due to gravity):

If the voltage across a bulb rated 220V – 60W drops by 1.5% of its rated value, the percentage drop in the rated value of the power is:

The energy equivalent of 1 g of a substance in joules is:
A fluid has stream line flow through a horizontal pipe of variable cross-sectional area. Then:
The slope of the graph plotted between the square of the time period of a planet \( T^2 \) and the cube of its mean distance from the sun \( r^3 \) is:
Four hydrogen atoms combine to form an \( ^4_2He \) atom with a release of 26.7 MeV of energy. This is:
A current carrying square loop is suspended in a uniform magnetic field acting in the plane of the loop. If \( \vec{F} \) is the force acting on one arm of the loop, then the net force acting on the remaining three arms of the loop is:
An electric dipole of dipole moment \( p \) is kept in a uniform electric field \( E \) such that it is aligned parallel to the field. The energy required to rotate it by 45° is:

In the circuit given below, the current is: 

The equation of a stationary wave is given by \[ y = 5 \sin \frac{\pi}{2} \cos 10\pi t \, {cm} \] The distance between two consecutive nodes (in cm) is:
The magnetic field at the centre of a circular coil having a single turn of the wire carrying current \( I \) is \( B \). The magnetic field at the centre of the same coil with 4 turns carrying the same current is:
A thin spherical shell of radius 12 cm is charged such that the potential on its surface is 60 V. Then the potential at the centre of the sphere is:
Add \( 2.7 \times 10^{-5} \) to \( 4.5 \times 10^{-4} \) with due regard to significant figures
The rate of emission of a perfectly black body at temperature \( 27^\circ C \) is \( E_1 \). If the temperature of the body is raised to \( 627^\circ C \), its rate of emission becomes \( E_2 \). The ratio of \( \frac{E_1}{E_2} \) is:
If the slope of the velocity-time graph of a moving particle is zero, then its acceleration is:
An electromagnetic wave is propagating in a medium with velocity \( \vec{v} = v \hat{i} \). The instantaneous oscillating magnetic field of this electromagnetic wave is along positive \( z \)-direction. Then the direction of the oscillating electric field is in the:
If the magnetic field energy stored in an inductor changes from maximum to minimum value in 5 ms, when connected to an a.c. source, the frequency of the a.c. source is:
Threshold frequency for photoelectric effect from a metallic surface corresponds to a wavelength of 6000 \({Å}\). The photoelectric work function for the metal is \( h = 6.6 \times 10^{-34} \, {Js} \):
The ratio between the root mean square velocities of \( O_2 \) and \( O_3 \) molecules at the same temperature is:
Radius of gyration \( K \) of a hollow cylinder of mass \( M \) and radius \( R \) about its long axis of symmetry is:

A monoatomic ideal gas of \( n \) moles heated from temperature \( T_1 \) to \( T_2 \) under two different conditions (i) at constant pressure, (ii) at constant volume. The change in internal energy of the gas is:

The length of the second's hand in a watch is 1 cm. The magnitude of the change in the velocity of its tip in 30 seconds (in cm/s) is: