Question

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 :

• A. $A$ for electric generators and transformers.
• 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 1

Answer: (D)

$B$ for electromagnets and transformers.

Answer 2

Conceptual (Requires low retentivity and low coercivity)