The charges on two exactly identical metal balls are + 40 muC and - 10 muC respectively and the distance between them is 2.0 ...

A, B and C are three conductors with capacitances of 0.4 mF, 2.5 muF and 2.4 muF , respectively. Ift he charges on them are 45 muC , 10 muC and 20 muC , respectively, find the direction of flow of positive charge when each is connected with the other with a conducting wire.

Two small conducting spheres of equal radius have charges + 10 muC and -20 muC respectively and placed at a distance R from each other. They experience force F_(1) . If they are brought in contact and separated to the same distance, they experience force F_(2) . The ratio of F_(1) to F_(2) is

Calculate the work required to bring a unit positive charge from infinity to a mid-point between two charges 20muC" and " 10muC separated by a distance of 50 m.

The charges on two spheres are +7muC and –5muC respectively. They experience a force F. If each of them is given an additional charge of –2muC , the new force of attraction will be

Two spheres A and B of radius 4 cm and 6 cm are given charges of 80 muC and 40 muC , respectively. If they are connected by a fine wire, then the amount of charge flowing from one to the other is

Two ball with charges 5muC and 10muC are at a distance of 1 m from each other. In order to reduce the distance between them to 0.5 m , the amount of work to be performed is

Two small identical spheres having charges +10 muC and - 90muC attract each other with a force of F newton . If they are kept in contant and then separated by the same distance, the new force between them is -

Two balls with charges 5 muC and 10m C are at a distance of 90m from each other. In order to reduce the distance between them to 45m , the amount of work to be performed in joule is :