What is the coupling field used between the electrical and mechanical – McqOptions

MCQOPTIONS

1.	What is the coupling field used between the electrical and mechanical systems in energy conversion devices?
A.	Magnetic field
B.	Electric field
C.	Magnetic field or Electric field
D.	None of the mentioned
Answer» D. None of the mentioned

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What is the coupling field used between the electrical and mechanical systems in energy conversion devices?