Question

Calculate the force of attraction between
two spheres each of charge 1 Milli coulomb
and 3km apart
on the earth's surface.​

Answer 1

Explanation:

When the two conducting spheres are brought together to touch, it is as though they become one single big conductor and the total charge of the two spheres spreads out across the whole surface of the touching spheres. When the spheres are moved apart again, each one is left with half of the total original charge.