The coeficient of magnetic coupling between two coils is minimum?
a) when the coils are wound on the same ferrite (iron) rod
b) for air-cored coils with coil axes parallel
c) for air-cored coils with axis perpendicular
d) for ferrite-cored coils with coil axes perpendicular.
Answers
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Explanation:
Coefficient of coupling is always less than unity, and has a maximum value of 1 (or 100%). This case, for which K = 1, is called perfect coupling, when the entire flux of one coil links the other.
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Answer:
for air-cored coils with axis perpendicular
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