Question

Three charges each of magnitude `q` are placed at the corners of an equilateral triangle, the electrostatic force on the charge place at the centre is (each side of triangle is `L`)

A. Zero
B. `(1)/(4pi epsilon_(0))(q^(2))/(L^(2))`
C. `(1)/(4pi epsilon_(0))(3q^(2))/(L^(2))`
D. `(1)/(12pi epsilon_(0))(q^(2))/(L^(2))`

Answer 1

Correct Answer - a
In the following figure since `|vec(F)_(A)=|vec(F)_(B)|=|vec(F)_(C )|` and they are equally inclined with each other, so their resultant will be zero.