Physics

Problem

Two point charges,

q_1 = -6.0\,\mu\text{C}

and

q_2 = +3.0\,\mu\text{C}

, form a system whose electric potential energy is

-0.81\,\text{J}

. What is the separation

r

between the charges? a)

0.45\,\text{m}

0.10\,\text{m}

0.20\,\text{m}

0.27\,\text{m}