Two identical tennis balls each having mass 'm' and charge 'q' are suspended from a fixed point by threads of length 'l'. What is the equilibrium separation when each thread makes a small angle 'θ' with the vertical ?
(1) \(x = \left(\frac{q^2l}{2\pi\varepsilon_0 mg}\right)^{\frac{1}{2}}\)
(2) \(x = \left(\frac{q^2l}{2\pi\varepsilon_0 mg}\right)^{\frac{1}{3}}\)
(3) \(x = \left(\frac{q^2l^2}{2\pi\varepsilon_0 m^2g}\right)^{\frac{1}{3}}\)
(4) \(x = \left(\frac{q^2l^2}{2\pi\varepsilon_0 m^2g^2}\right)^{\frac{1}{3}}\)
