There exist a magnetic field, perpendicular to the loop which varies, uniformly with rate `alpha`.Loop radius is a ,and resistance of the loop is R, Induced power in the loop is `(4 pi^(2)a^(4)alpha^(2))/(nR)`, Value of n is

The magnetic field perpendicular to the plane of a loop of area 0.1m^(2) is 0.2 T. Calculate the magnetic flux through the loop (in weber)

A conducting square loop is placed in a magnetic field B with its plane perpendicular to the field. Now the sides of the loop start shrinking at a constant rate alpha. the induced emf in the loop at an instant when its side is a is

The given loop is kept in a uniform magnetic field perpendicular to plane of loop. The field changes from 1000G to 500G in 5 seconds. the average induced emf in loop is -

A flexible wire loop in the shape of a circle has a radius that grows linearly with time. There is a magnetic field perpendicular to the plane of the loop that has a magnitude inversely proportional to the distance from the centre of the loop, B(r ) prop (1)/(r ) How does the emf E vary with time?

In the figure, the current l enters the circular loop of uniform wire of radius r at A and leaves it at B. The magnetic field of the centre of circular loop is

A conducting loop of radius R is present in a uniform magnetic field B perpendicular to the plane of the ring. If radius R varies as a function of time t, as R =R_(0) +t . The emf induced in the loop is

A conducting metal circular-wire-loop of radius r is placed perpendicular to a magnetic field which varies with time as B = B_0e^(-t//tau) , where B_0 and tau are constants, at time = 0. If the resistance of the loop is R then the heat generated in the loop after a long time (t to oo) is :

A conducting metal circular-wire-loop of radius r is placed perpendicular to a magnetic field which varies with time as B = B_0e^(-t//tau) , where B_0 and tau are constants, at time = 0. If the resistance of the loop is R then the heat generated in the loop after a long time (t to oo) is :

A conducting circular loop is placed is a uniform magnetic field B =0.20 T with its plane perpendicular to the field . Somehow, the radius of the loop starts shrinking at a constant rate of 1.0 mm s^(-1) . Find the induced emf in the loop at an instant when the radius is 2 cm.

A semi-circular loop of radius R is placed in a uniform magnetic field as shown. It is pulled with a constant velocity. The induced emf in the loop is