A magnetic circuit has an iron length of 20 cm and air gap length 0.1 – McqOptions

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1.	A magnetic circuit has an iron length of 20 cm and air gap length 0.1 cm. If Œºr = 200 then
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.	either (a) or (c)
Answer» B. mmf for iron is much less than that for air gap

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