NEET Physics Bar Magnet MCQ Question
A bar magnet with a magnetic moment of 5 A·m² is placed in a uniform magnetic field of strength 0.2 T. What is the torque experienced by the bar magnet when its magnetic moment is perpendicular to the magnetic field?
1 N·m
0 N·m
0.5 N·m
5 N·m
Correct Answer
Detailed Explanation
The torque on a bar magnet in a uniform magnetic field is calculated using the formula m × B. When m is perpendicular to B, the torque magnitude is simply mB, which equals 5 A·m² × 0.2 T = 1 N·m.
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