Question

A charged particle (charge q) is moving in a circle of radius R with uniform speed

• A. $\frac{qvR}{2}$
• B. $qv{R}^2$
• C. $\frac{qv{R}^2}{2}$
• D. $qvR$

Answer 1

The correct option is A $\frac{qvR}{2}$

$\mu =IA$

$I=\frac{Q}{t}=\frac{q}{\frac{2\pi R}{v}}=\frac{qv}{2\pi R}$

$A=\pi R^2$

$\mu =\frac{qvR}{2}$

Hence (A) option is the correct answer