Question

Three charges each`20muC` are placed at the corners of an equilateral triangle of side `0.4m` The potential energy of the system is
A. `18xx10^(-6)J`
B. `9J`
C. `9xx10^(-6)J`
D. `27J`

Answer 1

Correct Answer - 4
`U=(1)/(4piepsilon_(0))((q_(1)q_(2))/(r_(12))+(q_(2)q_(3))/(r_(23))+(q_(3)q_(1))/(r_(13)))`