A magnetic circuit has an iron length of 100 cm and air gap length 10 – McqOptions

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1.	A magnetic circuit has an iron length of 100 cm and air gap length 10 cm. If _r = 200 then which of the following is true?
A.	Mmf for iron and air gap are equal
B.	Mmf for iron is much less than that for air gap
C.	Mmf for iron is much more than that for air gap
D.	Mmf for iron and air gap are not equal
Answer» B. Mmf for iron is much less than that for air gap

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