Three charges are placed at the vertices of an equilateral trianlge of side `a` as shown in the following figure. The force experienced by the charge placed at the vertex `A` in a direction normal to `BC` is

Options

A. `Q^(2)//(4piepsilon_(0)a^(2))`
B. `sqrt(3)Q^(2)//(4piepsilon_(0)a^(2))`
C. Zero
D. `Q^(2)//(2piepsilon_(0)a^(2))`

Answer

c

Explanation

`|vec(F)_(B)|=|vec(F)_(C)|= k.(Q_(2))/(a^(2))`

Hence force experienced by the charge at `A` in the direction normal to `BC` is zero.