Two identical positive charges Q each are fixed at a distance of '2a' apart from each other. Another point charge q0 with mass 'm' is placed at midpoint between two fixed charges. For a small displacement along the line joining the fixed charges, the charge q0 executes SHM. The time period of oscillation of charge q0 will be
1
\(\sqrt{\frac{4 \pi^3 \varepsilon_0 m a^3}{q_0 Q}}\)
2
\(\sqrt{\frac{q_0 Q}{4 \pi^3 \varepsilon_0 m a^3}}\)
3
\(\sqrt{\frac{2 \pi^2 \varepsilon_0 m a^3}{q_0 Q}}\)
4
\(\sqrt{\frac{8 \pi^3 \varepsilon_0 m a^3}{q_0 Q}}\)