Question

Three point charges each of magnitude +q are kept at the vertices of equilateral riangle of side 'a'. Determine the electrostatics force experience by any one charge due to other two.​

Answer 1

We can solve this using two methods 

1>Using parallelogram law

2>By resolving the components of force

We can use both here since the charges are same and the distance is also same so the components in y-direction will be cancelled out.

And in X- direction will be added.