Question

A point charge $Q$ is placed at the centre of a circular wire of radius $R$ having charge q. The force of electrostatic interaction between point charge and the wire is:

• A. $\frac{qQ}{4\pi {\epsilon }_o{R}^2}$
• B. $\frac{q}{4\pi {\epsilon }_{o}R}$
• C. Zero
• D. none of these

Answer 1

The correct option is C Zero

A point charge $=Q$

radius $=R$

$F=\frac{1}{4\pi {ϵ}_0}\frac{Q\times X}{R^2}$

There is only one point charge. But according to Coulomb's law interaction force create with two point charges hence none of this is correct.