Three charges are placed along $x$-axis at $x=-a, x=0$ and $x=a$ as shown in the figure. The potential energy of the system is
Three charges are placed along $x$-axis at $x=-a, x=0$ and $x=a$ as shown in the figure. The potential energy of the system is
- A
$-\left(\frac{1}{4 \pi \varepsilon_0}\right) \frac{q^2}{a}$
- B
$-\left(\frac{1}{4 \pi \varepsilon_0}\right) \frac{3 q^2}{2 a}$
- C
$+\left(\frac{1}{4 \pi \varepsilon_0}\right) \frac{q^2}{a}$
- D
$+\left(\frac{1}{4 \pi \varepsilon_0}\right) \frac{3 q^2}{2 a}$
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