Physics

Problem

State the expression for the electrical potential energy

U

of two point charges

q_1

and

q_2

separated by a distance

r

in free space. a)

U = \dfrac{1}{8\pi\epsilon_0}\dfrac{q_1 q_2}{r}

U = \dfrac{1}{4\pi\epsilon_0}\dfrac{q_1 q_2}{r}

U = \dfrac{1}{4\pi\epsilon_0}\dfrac{q_1 q_2}{r^{2}}

U = 4\pi\epsilon_{0}\dfrac{q_1 q_2}{r}