The electrostatic force on a small sphere of charge due to another small sphere of…

PHYSICS · Multi-part · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

The electrostatic force on a small sphere of charge

0.4 \mu\text{C}

due to another small sphere of charge

-0.8 \mu\text{C}

in air is

0.2 \text{ N}

. (1) What is the distance between the two spheres? (2) What is the force on the second sphere due to the first?