AIPMT MAINS2011Physics-Electromagnetism
AIPMT MAINS 2011 Physics Magnetic Field MCQ Question
Type: MCQ-conceptual-Medium-Class 12
Charge q is uniformly spread on a thin ring of radius R. The ring rotates about its axis with a uniform frequency f Hz. The magnitude of magnetic induction at the center of the ring is :
A
μ₀qf/2πfR
B
μ₀qf/2πR
C
μ₀qf/2R
D
μ₀q/2fR
Correct Answer
Option A
Detailed Explanation
The magnetic field at the center of a rotating charged ring is given by B = μ₀qf/2R.
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