Question

4 equal point charges each 16microcoulomb are placed on the 4 corners of a square of side .2m.calculate the force on any 1 of the charges.

Answer 1

total force = [2]^(1/2)F+F'

F=k(16×10^-6)^2/2^2

F'=k(16×10^-6)^2/8

then we get,

F=1.103 N