Physics

Problem

Two point charges

+6\,\mu\text{C}

and

-3\,\mu\text{C}

are placed

30\,\text{cm}

apart in air. Determine the position(s) on the line joining them where a

+2\,\mu\text{C}

test charge would experience zero net electrostatic force. Give your answer as the distance from the

+6\,\mu\text{C}

charge.