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

Answer 1

Answer: (A)

Hysteresis loop with more area signifies a 'hard' ferromagnetic material and hysteresis loop with less area signifies a 'soft' ferromagnetic material. Hence, A is good for electromagnets and B is good for electric generators.