List of top Physics Questions asked in KEAM

Transformer core is laminated because:

For an elastic collision

If \( I = 16 \, \text{A} \), electron density \( n = 5 \times 10^{23} \, \text{m}^{-3} \), and \( A = 1 \times 10^{-7} \, \text{m}^2 \), find the drift velocity.

Which of the following statement is correct for EM wave:

A particle of charge equal to 10 times the charge of an electron revolves in a circle with frequency equal to 10 revolutions per second. Find the magnetic field at the centre of the circular path.

If a proton is displaced by 5m in an electric field of \(50 \, \text{N/C}\), what is the work done by the electric field?

At a certain height \( h \) from the surface of Earth, the value of acceleration due to gravity is \( \frac{g}{9} \), where \( g \) is the acceleration due to gravity at the surface. What is the value of \( h \) in terms of the radius of Earth \( R \)?

What should be connected in the circuit to remove ripples in AC:

Bernoulli's principle is applicable for:

Given \( I = 2A \), \( \phi = 10^{-2} \, \text{weber} \), \( N = 1000 \), calculate the self-inductance.

Bernoulli's principle is applicable for:

What is the ratio of the longest wavelength in Lyman and Balmer series?

What should be connected in the circuit to remove ripples in AC:

What should be connected in the circuit to remove ripples in AC?

A Carnot engine is working between 400K and 500K. If the output work is 1 kJ, what is the heat absorbed?

If \( I = 2 \, \text{A}, \, \phi = 10^{-2} \, \text{Weber}, \, N = 1000 \), calculate the self-inductance.

Find the relation between the wavelength of proton and electron, if both particles have the same kinetic energy.

A galvanometer of 500Ω resistance is shunted such that only 4% of the current passes through the galvanometer. Find the shunt resistance.

A particle of charge equal to 10 times the charge of electrons revolves in a circle with frequency equal to 10 revolutions per second. Find the magnetic field at the centre of the circular path.

If work function of a metal is 6.6 eV, find the threshold wavelength. \text{Given} \( h = 6.6 \times 10^{-34} \, \text{J} \cdot \text{s} \).

If a body of mass 5 kg has a linear momentum of 4 kg⋅m/s, find the kinetic energy.

A circular loop is made from a wire of length 6m. If 2A current passes through the circular loop, what is the magnetic moment of the loop?

Kirchhoff's first and second laws are consequence of conservation of ----- and ----- respectively:

If the ratio of escape velocities is 3:2 from two different planets A and B of radii in the ratio 2:3, find the ratio of acceleration due to gravity at the surface of A to that at the surface of B.

If a body travels half of the total distance with velocity of \(20 \, \text{km/hr}\) and other half with velocity of \(30 \, \text{km/hr}\), find average velocity.