Physics

Two co-planar circular loops are placed concentrically as shown in figure. The radius of the outer and inner loops are R and r respectively R >> r. The mutual inductance between them will be

 

The magnetic induction at the centre O in the figure shown is:

Five  metallic plates each of area A and separated from adjacent plate by a distance d as shown in figure. The capacitance of the system across A and B is:

A proton moving with velocity v along the axis approaches a circular current carrying loop as shown in figure. The magnitude of magnetic force on proton at this instant is

 

In the circuit shown in figure, what is the value of I0 just after pressing the key K?

The kinetic energy of a body decreases by 36%. The decrease in linear momentum is

A particle of mass m is dropped from rest from a height h₀ on a horizontal floor. The coefficient of restitution between the floor and particle is e. Maximum height attained by the particle after second collision is

An automobile engine develops 105 W power when rotating at an angular speed of 900 rad/minute. The instantaneous torque delivered by the engine is

Gravitational force between two point masses is found to be F when both are in vacuum. If both the masses are immersed in water, new gravitational force will be:

A ball is projected from ground with initial momentum p at an angle q. What is the magnitude of net change in linear momentum when it reaches at maximum height of journey?