Question

A coil of an area 2 m2 is placed in a magnetic field which changes from 4 Wb/m2 to 8 Wb/m2 in 2 seconds. Find the induced e.m.f. in the coil.

Answer 1

E= -d(B*A)/dt

E = -AdB/dt

E = -2*(4-8)/2

E = 4 V