| Hysteresis loops for two magnetic materials A and B are given below: [JEE MAIN - I 3-4-2016] |
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| These materials are used to make magnets for electric generators, transformer core and electromagnet core. Then it is proper to use; |
A) B for electromagnets and transformers.
B) A for electric generators and transformers.
C) A for electromagnets and B for electric transformers.
D) A for transformers and B for electric generators.
Correct Answer: A
Solution :
| [a] For electromagnet and transformers we require the core that can be magnetized and demagnetized quickly when subjected to alternating current. |
| From the given graphs graph B is suitable. |
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