If $3$ charges are placed at the vertices of equilateral triangle of charge ‘$q$’ each. What is the net potential energy, if the side of equilateral triangle is $l\, cm$

  • A

    $\frac{1}{{4\pi {\varepsilon _0}}}\frac{{{q^2}}}{l}$

  • B

    $\frac{1}{{4\pi {\varepsilon _0}}}\frac{{2{q^2}}}{l}$

  • C

    $\frac{1}{{4\pi {\varepsilon _0}}}\frac{{3{q^2}}}{l}$

  • D

    $\frac{1}{{4\pi {\varepsilon _0}}}\frac{{4{q^2}}}{l}$

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  • [AIEEE 2012]