One quantum of charge should be at least be equal to the charge in coloumb:

The value of charge of an electron is equal to _____.

What is the least possible value of charge?

Two negative charges each of 1 unit and a positive charge q are placed on a straight line. Where should the charge q be placed and what should be its value for equilibrium of the charges? Is this equilibrium stable, unstable or neutral ?

Four equal charges q are placed at the four corners of a square of length of each side a. What charge should be kept at the middle of the square so that the system is in equilibrium ?

A charge q is placed at the centre of the line joining two equal charges Q to establish equilibrium. The system of three charges will be in equilibrium if q is equal to

One coulomb is equal to charge on __________.