Physics-Bar Magnet
NEET Physics Bar Magnet MCQ Question
Type: MCQ-numerical-Easy-Class 12
A bar magnet with a magnetic moment of 4 Am² is placed in a uniform magnetic field of 0.5 T. What is the torque experienced by the magnet when its magnetic moment is perpendicular to the magnetic field?
A
2 Nm
B
0 Nm
C
4 Nm
D
8 Nm
Correct Answer
Option A
Detailed Explanation
The torque on a bar magnet in a magnetic field is given by τ = m × B. When m is perpendicular to B, τ = mB = 4 Am² × 0.5 T = 2 Nm.
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