Assertion :Mutual inductance of a pair of coils depend on their separation as well as their relative orientation. Reason: Mutual inductance depend upon the length of the coil only.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is C Assertion is correct but Reason is incorrect
The mutual inductance of a pair of coil is given by the formula:
$M = \frac{μ_{0} μ_{r} N_{1} N_{2} A}{l}$

According to this, the mutual inductance depends on the distance between the coils, the orientation of the coils and also on the length of the coil.

SO, the assertion is correct but the reason is not correct.

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