Question

In bringing an electron towards another electron, the electrostatic potential energy of the system
A. decreases
B. increases
C. remains same
D. becomes zero

Answer 1

Correct Answer - B
Electrostatic potential energy of system of two electrons
`U=(1)/(4pi epsilon_(0))((-e)(-e))/(r)=(1)/(4pi epsilon_(0))(e^(2))/(r)`
Thus, as r decreases, potential energy U increases.