List of top Physics Questions asked in KEAM

In dielectrics, polarization is the dipole moment per unit
If a particle is moving with a momentum of (2 × 1010) h kg·m/s, then the de Broglie wavelength associated with it (in angstrom) is (where h is Planck's constant)
If the position of the particle as a function of time \( t \) is \( \vec{r} = 8t \hat{i} + 3t^2 \hat{j} + 3 \hat{k} \, \text{m} \), then the acceleration of the particle is (in \( \text{m/s}^2 \))
The work done to lift a 60 kg mass to a height of 5 m from the ground is (g = 10 m/s\(^2\))
The intensity of a polarized light can be controlled by a second polarizer from
The dimensions of \( \frac{B}{E} \) are (B: Magnetic induction, E: Electric field intensity)
The eye defect astigmatism can be corrected by using a
The energy density of the electric field \( 2 \, \text{V/m} \) in a capacitor \( C \) is \( \varepsilon_0 \) is the permittivity of free space
A hockey player hits a ball with an impulse of 15 Ns. If time of hit is 0.2 s, the average force exerted by the player on the ball is
A carbon resistor has a tolerance of 20\%. As per the colour codes of resistors, the last band in that resistor is
When a current of 2 A flows through a wire for 2.5 s, the amount of heat liberated is 20 J. The resistance of the wire is
A bullet of 10 g mass is fired at a speed of 50 m/s by a gun of 2 kg mass. The recoil speed of the gun (in m/s) is
An ideal Carnot engine has an efficiency of 40 %. The ratio of the temperature of the sink to that of the source is
For the oscillations of a spring with spring constant k, the false statement is
The flux linked with a coil at any instant is given by \( \Phi = 5t^2 - 25t - 150 \) (in SI units). The emf induced in the coil at \( t = 2 \) s is
The angular momentum of the electron revolving in the 2nd orbit is
For smaller deformations, stress is directly proportional to the strain for any material. Then the constant of proportionality is called as its
The magnetic moment of an electron revolving in an orbit of 0.5 m radius with a velocity of \( 8 \times 10^7 \, \text{m/s} \) is (in \( \text{Am}^2 \))
If an electron moves with a velocity \( v \) in a magnetic field \( B \), the magnetic force on the electron is maximum when the angle between \( v \) and \( B \) is
If Q1 and Q2 are respectively the heat supplied and expelled by a system at a constant temperature, then the work done by the system is
Vibration of atoms and molecules produce electromagnetic radiation in the region of:
Which of the following is true in an SHM?
What is the speed of water flowing through a hole located at a depth \(h\) from the surface of water in a tank?
Specific heat capacity of diatomic gas at constant volume:
If a p-n junction diode is forward biased, then: