STANDARDPhysics-Magnetism
STANDARD Physics Magnetisation MCQ Question
Type: MCQ-numerical-Medium
A permanent magnet in the shape of a thin cylinder of length 50 cm has intensity of magnetisation 10⁶ A m⁻¹. The magnetisation current is
A
5 × 10⁵ A
B
6 × 10⁵ A
C
5 × 10⁴ A
D
6 × 10⁴ A
Correct Answer
Option A
Detailed Explanation
The magnetisation current Iₘ is given by Iₘ = M × l. With M = 10⁶ A m⁻¹ and l = 0.5 m, the calculation gives Iₘ = 10⁶ × 0.5 = 5 × 10⁵ A.
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