A Charge +Q₁ Is Brought to a Point a Distance

Multiple Choice

A charge +q₁ is brought to a point a distance r from a charge +q. Then +q₁ is removed and a charge -q₁ is brought to the same point. The electrostatic potential energy is

A) smaller for +q₁.
B) smaller for -q₁.
C) the same for both +q₁ and -q₁.
D) unknown; more information is needed to work out the answer.