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 :

Options

A. A for electric generators and transformers
B. A for electromagnets and B for electric generatos
C. A for transformers and B for electric generators
D. B for electromagnets and transformers.

Answer

D

Explanation

We know that area of the hysteresis loop tells the net energy absorbed per unit volume by the material per cycle of magnetisation.
We also know that for electromagnts and transformers, the energy loss should be small. Which is for. Thus option (d) is true.