Three charges $\mathrm{Q},+\mathrm{q}$ and $+\mathrm{q}$ are placed at the vertices of a right angled…

Three charges $\mathrm{Q},+\mathrm{q}$ and $+\mathrm{q}$ are placed at the vertices of a right angled isoscels triangle as shown in the figure. If the net electrostatic potential energy of the system is zero, the value of $Q$ is
  1. $\begin{aligned} & \frac{-2 q}{2+\sqrt{2}} \end{aligned}$
  2. $\begin{aligned} &\frac{+q}{2+\sqrt{2}}\end{aligned}$
  3. $\begin{aligned} & \frac{+2 q}{2+\sqrt{2}}\end{aligned}$
  4. $\begin{aligned} & \frac{-q}{2+\sqrt{2}}\end{aligned}$

Solution

No solution. Refer to answer key.

Asked in: AP EAMCET 2017 (26 Apr Shift 2)

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