question_answer 11)

Suppose the loop in Exercise 6.4 is stationer, but the current feeding the electromagnet that produces the magnetic field is gradually reduced so that the field decreases from its initial value of 0.3 T at the rate of 0.02 T . If the cut is joined and the loop has a resistance of 1.6, how much power dissipated by the loop as heat? What is the source of this power?  

Answer:

Induced e.m.f.                                                 Induced current,                                 Power loss                                                 Source of this power is the external agency which brings change in magnetic Field.