Physics

Problem

Three charges (each

Q

) are placed at the three corners of an equilateral triangle. A fourth charge

q

is placed at the center of the triangle. The ratio

|q/Q|

so as to make the system in equilibrium is (1)

1:3

(2)

1:\sqrt{3}

(3)

\sqrt{3}:1

(4)

2:\sqrt{3}