Three charges `q_(1) = 1 mu C, q_(2) = -2 muC` and `q_(3) = 3mu C` are placed on the vertices of an equilateral triangle of side 1.0 m. find the net electric force acting on charge `q_(1)`.
How to proceed Charge `q_(2)` will attract charge `q_(1)` (along the line joining them) and charge `q_(3)` will repel charge `q_(1)`. Therefore, two forces will act on `q_(1)`, one due to `q_(2)` and another due to `q_(3)`. Since , the force is a vector quantity both of these force (say `F_(1)` and `F_(2)`) will be added by vector method. Following are two methods of their addition

Options

A. `500 root- 7`
B. `700 root- 7`
C. `900 root- 7`
D. `800 root- 7`

Answer

C