Q. In bringing an electron towards another electron, the electrostatic potential energy of the system
A) Decreases
B) Increases
C) Remains same
D) Becomes zero
Explanation
(b) Electrostatic potential energy of system of two electrons
$U = \frac{1}{4\pi\varepsilon_{0}}\frac{( - e)( - e)}{r} = \frac{1}{4\pi\varepsilon_{0}}\frac{e^{2}}{r}$
Thus, as $r$ decreases, potential energy $U$ increases.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.