Physics-Bar Magnet
NEET Physics Bar Magnet MCQ Question
Type: MCQ-diagram based-Medium-Class 12
Consider a bar magnet placed such that its axis is at an angle of 30° with respect to 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
0.32 A m²
C
0.48 A m²
D
0.24 A m²
Correct Answer
Option A
Detailed Explanation
Using the formula τ = m B sin θ, where θ = 30° and sin θ = 1/2, we find that m = (0.016 Nm) / (800 × 10⁻⁴ T × 1/2) = 0.40 A m².
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