Question

three similar charges are kept at the three vertices of a triangle of side 1 m what is the force experienced by the charge at any vertex

please answer soon

Answer 1

Let the charges be q1=q2=q3=q

Force on charge q1 = Force by charge q2 and q3
                                = 2Fcosθ/2
                                = 2 x kq1q /r² x cos 60°/2
                                = 2kq1q/r² x 1/2
                                = kq1q / r² 
                                = F or force on charge q1 by q