Physics-Bar Magnet
NEET Physics Bar Magnet MCQ Question
Type: MCQ-diagram based-Easy-Class 12
A diagram shows a short bar magnet placed at an angle of 30° with an external magnetic field of 800 G. If the torque experienced by the bar magnet is 0.016 Nm, what is the magnetic moment of the magnet?
A
0.40 A m²
B
0.80 A m²
C
0.20 A m²
D
0.60 A m²
Correct Answer
Option A
Detailed Explanation
Using the formula τ = m B sin θ, and given τ = 0.016 Nm, B = 800 G = 800 × 10^−4 T, and sin 30° = 1/2, we find m = 0.40 A m².
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