Physics-Magnetic Properties of Materials
NEET Physics Magnetic Properties of Materials MCQ Question
Type: MCQ-numerical-Hard-Class 12
A solenoid has a core of material with a relative permeability of 400, carrying a current of 2 A, with 1000 turns per metre. Calculate the magnetisation M inside the core.
A
8 x 10^5 A/m
B
6 x 10^5 A/m
C
2 x 10^5 A/m
D
4 x 10^5 A/m
Correct Answer
Option A
Detailed Explanation
Magnetisation M is calculated as M = (μ_r - 1)H. Given H = nI = 2000 A/m, M = 399 x 2000 = 8 x 10^5 A/m.
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