NEETPhysics-Magnetism
NEET Physics Magnetic Field MCQ Question
Type: MCQ-conceptual-Hard
A wire in the form of a square of side 'a' carries a current i. Then the magnetic induction at the centre of the square wire is (Magnetic permeability of free space = μ₀)
A
μ₀i/2πa
B
μ₀i√2/πa
C
2√2μ₀i/πa
D
μ₀i√2/2πa
Correct Answer
Option C
Detailed Explanation
The magnetic field at the center of a square loop is given by B = 2√2μ₀i/πa, derived from the Biot-Savart law.
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