JEE PHYSICS MCQ: MAGNETISM AND MATTER

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Application +4 | -1

\tau_1, \tau_2, \tau_3

and

\tau_4

are the magnetic torques acting on the bar magnet when it is kept at angles of

30^{\circ}, 60^{\circ}, 90^{\circ}

and

135^{\circ}

respectively with the direction of the magnetic field, then which among the following is correct?

View answer and explanation

Correct option: D

\tau_3 > \tau_2 > \tau_4 > \tau_1

Option D (

\tau_3 > \tau_2 > \tau_4 > \tau_1

) is correct because the torque is proportional to the sine of the angle, and the sine values decrease in the order 90°, 60°, 135°, 30°.

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