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5.Magnetism and Matter
easy
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 the Reason is a correct explanation of the Assertion.
B
If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
C
If the Assertion is correct but Reason is incorrect.
D
If both the Assertion and Reason are incorrect.
(AIIMS-2017)
Solution
When a magnet is cut into pieces, each piece becomes new magnet.
$M\,'\, = \frac{{ml}}{2} = \frac{M}{2}$
Standard 12
Physics
