Three charges are arranged at the corner of a square ABCD of side 'a'. At A '(+q)', at B (-q), at C (+q) in coulomb. Find the work needed to bring +q to point D of the square when given other charges at A. B and C are fixed.
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → $\frac{q^2}{4πε_0a}\left(2-\frac{1}{\sqrt{2}}\right)$