STANDARDPhysics-Magnetism
STANDARD Physics Magnetic Moment MCQ Question
Type: MCQ-conceptual-Medium
A charged particle (charge q) is moving in a circle of radius R with uniform speed
A
qvR²/2
B
qvR²
C
qvR²/2
D
qvR
Correct Answer
Option A
Detailed Explanation
The magnetic moment μ of a charged particle moving in a circle is given by μ = IA, where I is the current and A is the area. Substituting I = qv/(2πR) and A = πR², the magnetic moment is μ = qvR²/2.
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