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29-05-2021 Magnetic Systems

Q. Most of the electromagnetic energy conversion devices belong to __________

A. singly excited magnetic systems
B. doubly excited magnetic systems
C. multiply excited magnetic systems
D. both doubly excited magnetic systems and multiply excited magnetic systems


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Dapzoi Verified
Commented on 2021-05-29 17:51:07 (IST)
Answer: D

Explanation: Widely used motor/generators such as synchronous and induction machines belong to doubly excited systems, and many other practical applications require multiply excited magnetic systems.