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?

A charged sphere is connected to a similar uncharged sphere. Then the percentage loss of energy is

An uncharged metal sphere is placed between two equal and oppositely charged metal plates. The nature of lines of force will be

An uncharged metal sphere is placed between two equal and oppositely charged metal plates. The nature of line of force will be

Two identical metallic spheres, having unequal opposite charges are placed at a distance of 0.50 m apart in air. After bringing them in ir contact with each other, they are placed at the same distance apart. Now, the force of repulsion between them is 0.108 N. Calculate the final charge on each of them.

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 .

A charged metallic sphere A having charge q_A is brought in contact with an uncharged metallic sphere of same radius and then separated by a distance d . What is the electrostatic force between them

Two insulated charge copper sphere A and B have their centres separated by a distance of 50 cm. What is the force of repulsion, if each sphere is charged double the above amonunt and the distance between them is halved?

A ball of charge q is plaed in a hollow conductive uncharged sphere. After this, the sphere is connected with earth for a short time and the ball is then removed from the sphere. The ball has not been brought into contact with the sphere. What charge will the sphere have after these operations? Where and how will this charge the distributed?