Two small spheres with mass `m_(1)` and `m_(2)` hang from massless insulating threads of length `l_(1)` and `l_(2)`. The two spheres carry charges `q_(1)` and `q_(2)` respectively. The spheres are hung such that they are on the same horizontal level and the threads are inclined to the vertical at angles `theta_(1)` and `theta_(1)`. Which of the condition is required if `theta_(1)=theta_(2)`?

Options

A. If `m_(1)=m_(2)`
B. `|q_(1)|=|q_(2)|`
C. `l_(1)=l_(2)`
D. `(q_(1))/(m_(1))=(q_(2))/(m_(2))`

Answer

A