Question

Three point charges +q , + 2q and – 4q where q = 0.1 μC, are
placed at the vertices of an equilateral triangle of side 10 cm
as shown in figure. The potential energy of the system is
(a) 3 × 10⁻³ J (b) –3 × 10⁻³ J
(c) 9 × 10⁻³ J (d) –9 × 10⁻³ J

Answer 1

hence options d is right