Question

A solid conducting sphere $A$ has zero net charge. A second solid conducting sphere $B$ has a positive net charge and is brought close to, but not touching sphere $A$. Between sphere $A$ and sphere $B$:

• A. There is no electrostatic force because sphere A is not charged.
• B. There is an attractive electrostatic force between them because sphere A becomes polarized.
• C. There is a repulsive electrostatic force between them because sphere A becomes polarized.
• D. There is not enough information given to determine the answer.

Answer 1

The correct option is A There is no electrostatic force because sphere A is not charged.

By Coulomb's law, the force in between sphere A and B is $F=\frac{k{q}_A{q}_B}{r^2}$ where $r$ be the distance between spheres.

Since, net charge of sphere A is zero so $q_A=0$

Thus, $F=0$