Two identical insulating spheres

PHYSICS · Subjective · CBSE · Physics · Electric Charges and Fields · Electric Charges and Fields

Problem

Two identical insulating spheres, each of mass

2.0\,\text{g}

, are suspended so that their centers can be positioned

8.0\,\text{cm}

apart. Sphere 1 initially carries

+3.0\times10^{-8}\,\text{C}

and Sphere 2 carries

-5.0\times10^{-8}\,\text{C}

. The spheres are briefly touched together, allowing charge to redistribute, and are then returned to the

8.0\,\text{cm}

separation. Calculate the magnitude of the electrostatic force between the spheres after they are separated.