Three charges $Q, +q$ and $+q$ are placed at the vertices of a right -angle isosceles triangle as shown below. The net electrostatic energy of the configuration is zero, if the value of $Q$ is
Three charges $Q, +q$ and $+q$ are placed at the vertices of a right -angle isosceles triangle as shown below. The net electrostatic energy of the configuration is zero, if the value of $Q$ is
- [JEE MAIN 2019]
- A
$+q$
- B
$\frac{{ - \sqrt 2 q}}{{\sqrt 2 + 1}}$
- C
$\frac{{ - q}}{{1 + \sqrt 2 }}$
- D
$-2q$
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