Question

Hysteresis loops for two magnetic $A$ 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 electromagnets and $B$ for electric generators
• B. $A$ for transformers and $B$ electric generators
• C. $B$ for electromagnets and transformers
• D. $A$ for electric generators and transformers

Answer 1

The correct option is C $B$ for electromagnets and transformers

The area of B-H curve gives us the hysteresis loses and less is the loses of generator, transformer more is the effective work so polar one is that which is sharp curve and less B-H area.