Assertion :A planar circular loop of area A and carrying current I is equivalent to magnetic dipole of dipole moment M $=$ IA. Reason: At large distances, magnetic field of circular loop and magnetic dipole is same.

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 A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
A planar current carrying circular loop behaves as a bar magnet (or a magnetic dipole) at large distances from the loop as shown in the figure. Hence, their magnetic field at large distances is same.

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Assertion :A planar circular loop of area A and carrying current I is equivalent to magnetic dipole of dipole moment M = IA. Reason: At large distances, magnetic field of circular loop and magnetic dipole is same.

Assertion :A planar circular loop of area A and carrying current I is equivalent to magnetic dipole of dipole moment M $=$ IA. Reason: At large distances, magnetic field of circular loop and magnetic dipole is same.