List of top Physics Questions asked in KEAM

The average kinetic energy of a gas molecule is
A particle executing simple harmonic motion (SHM) has a maximum velocity of $1~ms^{-1}$ and a maximum acceleration of $2\pi~ms^{-2}$. Its time period of vibration is
The frequency of a simple pendulum is f. If its length is increased by four times, its frequency will become
The speed of sound in air is $340~ms^{-1}$. The frequency of the fundamental note emitted by a pipe of length 2 m closed at one end is
The coefficient of linear expansion of a solid depends on
A satellite revolves around a planet in a circular orbit of radius R with the time period t. If the orbital radius is 3R, then its time period of revolution is
In an isothermal process, which of the following quantities remains constant?
The root mean square (rms) speed of the molecules of an ideal gas at a temperature T is proportional to
The change in the value of acceleration due to gravity (g) at a height h above the surface of the earth is same as that at a depth d below the surface. If both h and d are much smaller than the radius of the earth (R), then
Two bodies A and B of masses 80 g and 120 g move with same speed, $6~cm~s^{-1}$ in a plane. The speed of the centre of mass of the system is
A block of mass 2 kg slides on a rough horizontal surface with initial speed $10~ms^{-1}$. The distance travelled by the block before it stops is ($g=10~ms^{-2}$, $\mu_{k}=0.2$)
A particle of mass m is initially at rest. A time varying force $F=kt$ acts on it. Its velocity after time t is
A flywheel in a steam engine ensures a smooth ride for the passengers on the vehicle because it has
A passenger of mass m stands on a weighing scale in an elevator accelerating upward with an acceleration of $g/2$. The scale would read ($g=$ acceleration due to gravity)
The position vector of a particle is given by $\vec{x}=(t^{3}-3t^{2}+2)\hat{i}$, the time at which the velocity of the moving particle becomes zero is
A non-conservative force is one for which
The area under the velocity-time graph of a particle is equal to its
If the time period of oscillation of a liquid drop is given by $T=k\sqrt{\frac{\rho r^{4}}{\sigma}}$, where $\rho$ refers to its density, $r$ its radius and $k$ is a dimensionless constant, then $\sigma$ has the units of
The dimensional formula for the rate of change of momentum of a moving body is
If both x and y components of a vector are equal, its angle with x-axis is
A $250$ watt bulb emits monochromatic light of wavelength $198.78$ nm. How many photons are emitted by the bulb per second? \ (Planck’s constant = $6.626 \times 10^{-34}$ J s and velocity of light = $3 \times 10^8$ ms$^{-1}$)
The rate of fall of the voltage across the capacitor in a filter used in a diode rectifier depends
The radius of innermost orbit of an electron in the hydrogen atom is $0.53\,\text{\AA}$. Then, the radius of the 3rd electron orbit is:
The energy released by $2.35\,g$ of $^{235}U$ by fission in a nuclear reactor (in $MeV$) is (Average energy released per fission is $200\,MeV$):
In a silicon crystal containing $N$ atoms, at absolute zero the $4N$ energy states of