NEET2015Physics-Magnetism
NEET 2015 Physics Magnetic Field due to Current MCQ Question
Type: MCQ-conceptual-Medium-Class 12
An electron moving in a circular orbit of radius r makes n rotations per second. The magnetic field produced at the centre has magnitude
A
μ₀ne
B
Zero
C
μ₀ne / r
D
μ₀ne / 2π
Correct Answer
Option C
Detailed Explanation
The magnetic field at the center of a circular loop carrying current is given by B = μ₀I/2r. Here, the current I is due to the electron's motion, which is ne, leading to the expression μ₀ne.
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