RE-NEET2024Physics-Magnetism
RE-NEET 2024 Physics Magnetic Moment MCQ Question
Type: MCQ-numerical-Medium-Class 12
The magnetic moment of an iron bar is M. It is now bent in such a way that it forms an arc section of a circle subtending an angle of 60° at the centre. The magnetic moment of this arc section is
A
3M/π
B
4M/π
C
M/π
D
2M/π
Correct Answer
Option A
Detailed Explanation
The magnetic moment of the arc is proportional to the angle subtended at the center. For an angle of 60°, the magnetic moment is (60/360) * M = M/6. Converting to radians gives 3M/π.
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