Question

Two equally charged pith balls 3cm apart reples each other with a force of 4*10 newton .the charge of each balls is

Answer 1

Explanation:

we have 3cm=0.03m

F=40N

let the charge is q

then according to question

kq²/(0.03)²=40

q²=40*(0.03)²/9*10^9

q²=4*10^-10

q=2*10^-5