Question

An attractive force of 5N is acting between two charges of +2.0 μC & -2.0 μC placed at
some distance. If the charges are mutually touched and placed again at the same distance,
what will be the new force between them?

Answer 1

Charge will flow on touching them from

Negatively charged sphere to positively charged sphere. Charge will distribute equally. After touching, charge on each sphere = (-2+2)/2 = 0/2 = 0

So net force is also zero