Question

A conducting ring, of radius r, is placed in a varying magnetic field perpendicular to the plane of the ring. If the rate at which the magnetic field, varies, is x, the (average) electric field intensity, at any point of the ring, would be

(1) r x

(2) rx/2

(3) 2rx

(4) 4r/x

Answer 1

(2) rx/2

Let E be the field strength at any point on the circumference of the ring. Then, the emf induced