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 transformer and B for electric generators
• D. B for electromagnets and transformers

Answer 1

The correct option is D B for electromagnets and transformers

Coercivity is lower in (B). For electromagnet and transformer, the coercivity should be low to reduce energy loss