Electric Charge...

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

The force between two charges is 120 N. If the distance between the charges is doubled, the force will be

Which one of the following statement regarding electrostatics is wrong ?

Two similar charge of +Q , as shown in figure are placed at A and B. _q charge is placed at point C midway between A and B. _q charge will oscillate if

When the distance between two charged particle is halved, the force between them becomes

 Two point charges in air at a distance of 20 cm. from each other interact with a certain force. At what distance from each other should these charges be placed in oil of relative permittivity 5 to obtain the same force of interaction

A certain charge Q is divided at first into two parts, (q) and (Q-q). Later on the charges are placed at a certain distance. If the force of interaction between the two charges is maximum then

Two small balls having equal positive charge Q (Coulomb) on each are suspended by two insulating strings of equal length 'L 'metre, from a hook fixed to a stand. The whole set up is taken in a satellite in to space where there is no gravity (state of weight lessness). Then the angle (q) between the two strings is

Two point charges -1 ×10^-6  C and 4 ×10^-6  C separated by 3 m distance have zero field location of

Two charges 4q and q are placed 30 cm. apart. At what point the value of electric field will be zero