Physics-Bar Magnet
NEET Physics Bar Magnet MCQ Question
Type: MCQ-fact-Hard-Class 12
What is the magnetic moment of a short bar magnet if it experiences a torque of 0.016 Nm when placed at an angle of 30° with an external magnetic field of 800 G?
A
0.40 Am²
B
0.32 Am²
C
0.48 Am²
D
0.56 Am²
Correct Answer
Option A
Detailed Explanation
The magnetic moment can be calculated using the formula τ = mB sin θ. Using the provided values, the magnetic moment (m) is determined to be 0.40 Am².
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