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Calculate the value of the coefficient of coupling for the tightly coupled coils.

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Calculate the value of the coefficient of coupling for the tightly coupled coils.

(a) 0

(b) 1

(c) 3

(d) 2

I got this question in unit test.

My question is based upon Dynamic Braking of DC Shunt Motors in portion Braking of DC Motors & Induction Motors of Electric Drives

1 Answer

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The correct option is (b) 1

For explanation I would say: The coefficient of coupling expresses how the two coils are magnetically coupled. It is mathematically represented as K=M÷√L1.L2. For tightly coupled coils, the value of the mutual inductance is √L1.L2. The value of the coefficient of coupling is 1.

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