Assertion: The poles of a magnet cannot be se | vedclass

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(B) The Assertion is correct because magnetic monopoles do not exist; breaking a magnet simply creates two smaller magnets,each with its own north and

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If both Assertion and Reason are correct but the Reason is not a correct explanation of the Assertion.

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(B) The Assertion is correct because magnetic monopoles do not exist; breaking a magnet simply creates two smaller magnets,each with its own north and south pole.The Reason is also correct. The magnetic moment $M$ of a bar magnet is given by $M = m 	imes 2l$,where $m$ is the pole strength and $2l$ is the length. When the magnet is cut into two equal pieces perpendicular to its length,the pole strength $m$ remains the same,but the length of each piece becomes $l$. Therefore,the new magnetic moment $M' = m 	imes l = M/2$.Since the Reason explains why the magnetic properties change but does not explain why poles cannot be isolated,the correct option is $B$.

Assertion: The poles of a magnet cannot be separated by breaking it into two pieces.
Reason: The magnetic moment will be reduced to half when a magnet is broken into two equal pieces.

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Assertion: The poles of a magnet cannot be separated by breaking it into two pieces.Reason: The magnetic moment will be reduced to half when a magnet is broken into two equal pieces.