Electric Potential Energy Video Lessons

Concept

# Problem: Suppose you have two point charges of opposite sign. As you move them farther and farther apart, the potential energy of this system relative to infinity(a) stays the same.(b) Increases.(c) Decreases.(d) The answer would depend on the path of motion

###### FREE Expert Solution

The potential energy of the system is given by:

$\overline{){\mathbf{U}}{\mathbf{=}}\frac{\mathbf{k}{\mathbf{q}}_{\mathbf{1}}{\mathbf{q}}_{\mathbf{2}}}{\mathbf{r}}}$, where k is Coulomb's constant and r is the distance between two charges q1 and q2.

The given charges are equal in magnitude but opposite in sign.

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###### Problem Details

Suppose you have two point charges of opposite sign. As you move them farther and farther apart, the potential energy of this system relative to infinity
(a) stays the same.
(b) Increases.
(c) Decreases.
(d) The answer would depend on the path of motion