Physics

Problem

Two point charges

+3\,\mu\text{C}

and

+2\,\mu\text{C}

are fixed

10\,\text{cm}

apart in air. The region between them is then completely filled with a dielectric material of constant

K=5

, without altering their positions. What is the ratio of their new potential energy to the original potential energy? a)

5

1

\dfrac{1}{5}

\sqrt{5}