Question

51. Magnetic flux of a 20 round coil is reduced to
zero from 0.3 weber in one second then the
induced e.m.f. between the terminal of coil​

Answer 1

EMF induced = Net change of flux through the entire coil

E = N dФ/dt             (N = number of turns)

                                (Ф=Flux) d/dt = rate of change

E = 20 x 0.3

 = 6 V...