Physics

Problem

Three identical positive point charges

q

are kept at the vertices

A, B

and

C

of an equilateral triangle. The net electrostatic force on the charge at vertex

A

is directed a) along the angle bisector of

\angle A

inside the triangle b) along the perpendicular drawn from

A

to side

BC

, away from the triangle c) zero, because the forces cancel out completely d) along the perpendicular drawn from

A

to side

BC

, towards the interior of the triangle