Charge `q_(2)` of mass m revolves around a stationary charge `q_(1)` in a circulare orbit of radius r. The orbital periodic time of `q_(2)` would be

Options

A. `[(4 pi^(2) mr^(3))/(k q_(1)q_(2))]^(1//2)`
B. `[(k q_(1) q_(2))/(4 pi^(2) mr^(3))]^(1//2)`
C. `[(4 pi^(2)mr^(4))/(k q_(1) q_(2))]^(1//2)`
D. `[(4 pi^(2) mr^(2))/(k q_(1) q_(2))]^(1//2)`

Answer

A