List of top Physics Questions asked in KEAM

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 the amplitude of the wave \( y = 3\sin(3x - 5t) + A\cos(3x - 5t) \) m is 5 m, the value of A is
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
The eye defect astigmatism can be corrected by using a
If the frequency of an electromagnetic wave is 2 MHz, then the time period of oscillation of the accelerated charge 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
For smaller deformations, stress is directly proportional to the strain for any material. Then the constant of proportionality is called as its
In a semiconductor crystal, the total number of electrons in the outer shell is 4N . At absolute zero, the number of energy states of valence and conduction band are respectively
Energy equivalent of mass 0.5 kg is
An astronaut experiences weightlessness in space satellite because
What is the ratio of gyration of ring and disc?
Find the magnetic field inside a solenoid having number of turns 7000, length 1m, and current 1 A.
Relation between \(C_p\), \(C_v\) and \(R\)
A lift having mass 1000kg moves upward against a frictional force of 2000N. Power given by motor is 36000W. What is the velocity of the lift?
Forces acting on 2 bodies of masses 2kg and 3kg are same. What is the ratio of their acceleration?
If a bar magnet is doped into a circular ring placed horizontally, then what change will happen?
Acceleration of the freely falling metal rod in a cycling ring?
Band gap energy of Si is:
A ball of mass 10g is dropped from a height of 50m. If 30J energy is lost due to air resistance, then what is the velocity of the ball when it hits the ground?
If \( \frac{C_p}{C_v} \) is unity for a process, \( PV^{\gamma} = \text{constant} \), then the process is:
Product of uncertainty in position (\(\Delta x\)) and uncertainty in velocity (\(\Delta v\)) has unit:
Which of the following is incorrect?
3 capacitors of capacitance \( 12 \mu \text{F} \) each is connected in series. If the voltage is 12V, what charge is drawn from the cell?
The dimension of \( \lambda \times t \) (decay constant \(\lambda\) multiplied by time \(t\)) is:
Specific heat capacity of diatomic gas at constant volume: