As an electron (q2) moves from point A to point B, it moves farther from a positive charge (q1). Does the electric potential energy increase, decrease, or stay the same.
The Attempt at a Solution
The electric potential energy decreases in magnitude and absolutely.
Since r is increasing, the magnitude of U is decreasing. Since q1 & q2 are of opposite sign, (-kq1q2/r) > 0 , so U is also getting closer to zero. If q1 & q2 had the same charge, the magnitude of U would be decreasing, but it would be getting less negative so actually increasing.
I am concerned because an answer I found online has it the other way around.