Two coils having self inductances 60 mH each, are coupled with each other. If the coefficient of coupling is 0.75, calculate the mutual inductance between them.

Q.9 Two coils having self inductances 60 mH each, are coupled with each other. If the coefficient of coupling is 0.75, calculate the mutual inductance between them.

Doubtly Asked 28 Oct 2026 Board exam · March 2025 hsc 12th Save WhatsApp Report

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Answer: \(M = 45\) mH

Mutual inductance \(M = K\sqrt{L_1L_2}\):

\[M = 0.75\sqrt{60 \times 60} = 0.75 \times 60 = 45 \text{ mH} = 4.5 \times 10^{-2} \text{ H}\]

Doubtly AI · 28 Oct 2026 AI-verified · Oct 2026 Report

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Two coils having self inductances 60 mH each, are coupled with each other. If the coefficient of coupling is 0.75, calculate the mutual inductance between them.

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