Q. A charged particle (charge q) is moving in a circle of radius R with uniform speed v. The associated magnetic moment μ is given by
A) qvR²
B) qvR²/2
C) qvR
D) qvR/2
Explanation
[Solution from source] The circulating charge is a current I = q/T = qv/(2πR); μ = I × πR² = qvR/2. qvR misses the factor ½. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.