1.

The coeficient of magnetic coupling between two coils is minimum?a) when the coils are wound on the same ferrite (iron) rodb) for air-cored coils with coil axes parallelc) for air-cored coils with axis perpendicular d) for ferrite-cored coils with coil axes perpendicular.

Answer»

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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