Question

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

• A. If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
• B. If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
• C. If Assertion is correct but Reason is incorrect
• D. If both the Assertion and Reason are incorrect

Answer 1

Answer: (B)

When a magnet is cut into pieces, each piece becomes new magnet.
$M' = \frac{m \ell}{2} = \frac{M}{2}$