Hysteresis loops for two magnetic materials A and B are given below : These materials are used to make magnets for electric generators, transformer core and electromagnet core. Then it is proper to use :

Question

G1 Physics · Accepted Answer

Electromagnet and transformer cores need small coercivity and low hysteresis loss, i.e. the narrower loop B. Material A has the broader loop and is suited to permanent/generator magnets. Hence option A.