Physics-(general)
NEET Physics (general) MCQ Question
Type: MCQ-numerical-Hard-Class 12
If a conductor is placed along the axis of a circle of radius r and carries a current I, what is the magnetic field at any point on the circle?
A
μ₀I / (2πr)
B
μ₀I / (4πr)
C
μ₀I / (πr)
D
μ₀I / (8πr)
Correct Answer
Option A
Detailed Explanation
The magnetic field at every point on a circle of radius r with a wire carrying current I along the axis is given by the formula B = μ₀I / (2πr), derived from Ampere's Circuital Law.
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