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NEET 1997 (AIPMT) · Bar Magnet & Magnetic Moment

Bar Magnet & Magnetic Moment question from NEET 1997 (AIPMT)

Q15NEET 1997 · AIPMTEasy

Bar Magnet & Magnetic Moment

A bar magnet of magnetic moment $M$ is cut into two parts of equal length. The magnetic moment of each part will be

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Answer: (d)

Cutting into two equal lengths (perpendicular to the axis) keeps pole strength $m$ but halves the length.
$M' = m\cdot\dfrac{l}{2} = \dfrac{M}{2}$
So the answer is (d) $0.5\,M$ .

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