The excess (equal to number) number of electrons that must be placed on each of two small spheres spaced `3cm` apart with force of repulsion between the spheres of be `10^(-19)N` is

The excess (equal to number) number of electrons that must be placed on each of two small spheres spaced 3cm apart with force of repulsion between the spheres of br 10^(-19)N is

Calculate the excess number of electrons that must be placed on each of the two similar uncharged spheres that are located 5 cm part of (in air), such that the force of repulsion between them is 36 xx 10^(-19) N .

How far two electrons should be placed so that the force of repulsion between them is equal to the weight of an electron ?

What is the force of repulsion between two charges of 1C each, kept 1m apart in vacumm ?

Two spherical balls of mass 10 kg each are placed 10 cm apart. Find the gravitational force f attraction between them.

A small uncharged sphere is placed in contact with an equal and similar charged sphere and then removed to a distance of 4 cm. The force of repulsion between them is now 9xx10^(-5) N. What was the original charges in the charged sphere?

Two spheres, each of mass 625 kg, are placed with their centres 50 cm apart. The gravitational force between them is

What is the force between two small charged of 2 xx 10^(-7) C placed 30 cm apart in air?