Hysteresis loops for two magnetic matericals `A` and `B` are as given below: `(2016)`


These materials are used to make magnets for electric generators, transformer core and electromagent core. Then, it is proper to use

Options

A. On substituting the value of `theta`
B. A for electromagnets and `B` for electric generators
C. A for transformers and `B` for electric generators
D. `B` for electromagnets and transformers

Answer

D

Explanation

We need less retentivity and less coercivity and less coercivity for electronagents and transformers. Hence samll area of hysteresis loop.