Physics-Magnetic Properties of Materials
NEET Physics Magnetic Properties of Materials MCQ Question
Type: MCQ-fact-Easy-Class 12
What is the magnetic field B in a solenoid with a core of relative permeability 400, carrying a current of 2A and having 1000 turns per meter?
A
0 T
B
0.8 T
C
0 T
D
0.4 T
Correct Answer
Option A
Detailed Explanation
The magnetic field B is calculated using the formula B = μ_r μ_0 H, where H = nI. For the given values, B = 400 × 4π × 10^-7 (N/A^2) × (1000 × 2) = 1.0 T.
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