If two coils of self inductance L1 and L2 are coupled together, their mutual inductance becomes

If two coils of self inductance L1 and L2 are coupled together, their mutual inductance becomes M=kL1 L2 where k = coupling constant whose value lies between 0 and 1.

If two coils of self inductance L1 and L2 are coupled together, their mutual inductance becomes

If two coils of self inductance L1 and L2 are coupled together, their mutual inductance becomes M=kL1 L2 where k = coupling constant whose value lies between 0 and 1.

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If two coils of self inductance L₁ and L₂ are coupled together, their mutual inductance becomes

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$M = k \sqrt{\frac{L_{1}}{L_{2}}}$

$M = k \sqrt{L_{1} + L_{2}}$

None of the above

$M = k \sqrt{L_{1} L_{2}}$

answer is A.

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Detailed Solution

If two coils of self inductance L₁ and L₂ are coupled together, their mutual inductance becomes $M = k \sqrt{L_{1} L_{2}}$ where k = coupling constant whose value lies between 0 and 1.

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