Three charges `Q, (+q)` and `(+q)` are placed at the vertices of an equilateral triangle
Channel: Doubtnut
Date: 2020-01-19

Three charges `Q, (+q)` and `(+q)` are placed at the vertices of an equilateral triangle of side `l` as shown in the figure. It the net electrostatic energy of the system is zero, then `Q` is equal to