A ring of radius \( R \) carries a charge \( +q \). A test charge \...

A ring of radius \( R \) carries a charge \( +q \). A test charge \( -q_{0} \) is released on its axis at a distance \( \sqrt{3} R \) from its centre. How much kinetic energy will be acquired by the test charge when it reaches at the centre of the ring?
(a) \( \frac{1}{4 \pi \varepsilon_{0}}\left(\frac{q q_{0}}{R}\right) \)
(b) \( \frac{1}{4 \pi \varepsilon_{0}}\left(\frac{q q_{0}}{2 R}\right) \)
(c) \( \frac{1}{4 \pi \varepsilon_{0}}\left(\frac{q q_{0}}{\sqrt{3} R}\right) \)
(d) \( \frac{1}{4 \pi \varepsilon_{0}}\left(\frac{q q_{0}}{3 R}\right) \)