Two identical tennis ball of mass m and charge q are hinged by a common support with help of a string of length 'l'. If system is in equilibrium then find distance between balls? ignore gravitational interactions between balls. (`theta` is very small)

Options

A. `((k q^2 l)/(mg))^(1/3)`
B. `((3 k q^2 l)/(mg))^(1/3)`
C. `((2k q^2 l)/(mg))^(1/3)`
D. `((3k q^2 l)/(2mg))^(1/3)`