Question

Three + Ve charges of equal magnitude 'q' are placed at the vertices of an equilateral triangle of side 'l' How can the system of charges be placed in equilibrium?

• A. By placing a charge $Q=(-q/\sqrt{3})$ at the centroid of the triangle
• B. By placing a charge $Q=\left(q/\sqrt{3}\right)$ at the centroid of the triangle
• C. By placing a charge $Q=q$ at a distance l from all the three charges
• D. By placing a charge$Q=-q$ above the plane of the triangle at a distance lfrom all the three charges.

Answer 1

The correct option is A By placing a charge $Q=(-q/\sqrt{3})$ at the centroid of the triangle