STANDARDPhysics-Magnetism
STANDARD Physics Magnetic Moment of Solenoid MCQ Question
Type: MCQ-numerical-Medium
A closely wound solenoid of 750 turns and area of cross section of 5 × 10⁻⁴ m² carries a current of 3.0 A. Its associated magnetic moment is
A
4.12 J T⁻¹
B
3.12 J T⁻¹
C
2.12 J T⁻¹
D
1.13 J T⁻¹
Correct Answer
Option D
Detailed Explanation
The magnetic moment m = nIA = 750 × 3 × 5 × 10⁻⁴ = 11250 × 10⁻⁴ = 1.125 J T⁻¹ = 1.13 J T⁻¹ along the axis of solenoid.
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