It is required to hold equal charges in equilibrium at the corners of a square

PHYSICS · Single correct · CBSE · Physics · Electric Charges and Fields · Electric Charges and Fields

Problem

It is required to hold equal charges

q

in equilibrium at the corners of a square. What charge when placed at the center of the square will do this? (1)

-\frac{q}{2}(1+2\sqrt{2})

(2)

\frac{q}{2}(1+2\sqrt{2})

(3)

\frac{q}{4}(1+2\sqrt{2})

(4)

-\frac{q}{4}(1+2\sqrt{2})