JEE PHYSICS MCQ: MAGNETISM AND MATTER

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Application +4 | -1

A magnet when placed at an angle of

30^\circ

to a uniform field of strength

{10^{ - 4}}\,\,\,wb\,{m^{ - 2}}

experiences a couple of moment

4 \times {10^{ - 5}}\,\,Nm

. What is the magnetic moment of the magnet?

View answer and explanation

Correct option: C

0.8\,\,\,{\text{A}}{{\text{m}}^2}

Option C (

0.8 \,\,\,{\text{A}}{{\text{m}}^2}

) is correct because it is calculated directly from the torque equation

\tau = MB\sin \theta

given the magnetic field strength and the angle.

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