Assertion :Magnetic lines forms closed loops in nature. Reason: Mono-magnetic pole does not exist in nature.

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.
We have an analogous Gauss law for magnetism which states that the net magnetic flux through any closed surface is essentially zero. Lets say that the surface housed a magnetic monopole, then this flux would be non zero, which has never been observed so this confirms non-existence of magnetic monopoles. Therefore, this suggests that field lines must essentially be closed loops.
Thus, assertion and reason are both correct and reason is the correct explanation for assertion.

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Similar questions

Assertion (A) Order of the reaction can be zero or fractional.

Reason (R) We cannot determine order from balanced chemical equation.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

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