Magnetics 5 Question 7
7. Hysteresis loops for two magnetic materials $A$ and $B$ are as given below:
(2016 Main)
(A)
(B)
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
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Answer:
Correct Answer: 7. (d)
Solution:
- We need high retentivity and high coercivity for electromagnets and small area of hysteresis loop for transformers.
