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Can the coupling coefficient practically ever be equal to 1?

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in Basic Electrical Engineering by (88.7k points)
Can the coupling coefficient practically ever be equal to 1?

(a) Yes

(b) No

(c) Depends on the current in coil 1

(d) Depends on the current in coil 2

This question was addressed to me during an internship interview.

The origin of the question is Coupling Coefficient topic in portion Inductance in a DC Circuit of Basic Electrical Engineering

1 Answer

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Best answer
Right answer is (b) No

Best explanation: All the flux of coil 1 can never link with coil 2. Loss occurs practically due to which coupling coefficient cannot be equal to 1.

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