Question

On rotating a point charge having a charge q around a charge Q in a circle of radius r. The work done will be

• A. $q \times 2\pi r$
• B. $\frac{q \times 2\pi Q}{r}$
• C. Zero
• D. $\frac{Q}{2\varepsilon_{0}r}$

Answer 1

Answer: (C)

Zero

Answer 2

Since charge Q moving on equipotential surface so work done is zero.