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Calculate the value of the coefficient of coupling for the isolated coils.

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Calculate the value of the coefficient of coupling for the isolated coils.

(a) 0

(b) 1

(c) 5

(d) 7

I had been asked this question by my college director while I was bunking the class.

This interesting question is from Regenerative Braking of DC Shunt Motors in portion Braking of DC Motors & Induction Motors of Electric Drives

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Right option is (a) 0

Explanation: The coefficient of coupling expresses how the two coils are magnetically coupled. It is mathematically represented as K=M÷√L1.L2. For the isolated coils, the value of the mutual inductance is 0. The value of the coefficient of coupling is 0.

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