A uniform magnetic field is establish perpendicular to the plane of a loopof radius 14cm.Resistance 40ohmn, and negligible self-induce.The magnitude of the field increase at a rate of 400mT/s.

Question

(i)Find the induce emf in the loop
(ii)the induced current in the loop and
(iii)The rate of joule heating in the loop

Answer 1

a) V = BA/t (you've been given B/t)
b) i = V/R
c) E/t =P = Vi