If two identical spheres having charge `16 mu C` and `-8 mu C` are kept at certain distance apart , then the force if F. They are touched and again kept at the same distance , the force becomes.

If two identical spheres having charge 16muC and -8mu C are kept at certain distance apart, then the force is F. They are touched and again kept at the same distance, the force becomes

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 similar very small conducting spheres having vharges 40 muC and -20 muC are some distance apart. Now they are touched and kept at the same distance. The ratio of the initial to the final force between them is :

Two identical bodies in which charges are 40muC and -20muC . They are some distance apart. Now they are touched and kept at the same distance. The ratio of the initial to the final force between them is

Two identical balls having like charges and placed at a certain distance apart repel each other with a certain force. They are brought in contact and then moved apart to a distance equal to half their initial separation. The force of repulsion between them increases 4.5 times in comparision with the initial value. The ratio of the initial charges of the balls is

An attractive force of 5 N is acting between two charges of + 2muC and - 2 mu C placed at some distance. If the charges are mutually touched and placed again at the same distance , what will be the new force, between them ?

There are two charges +2 mu C and -6 mu C at certain separation.Then the ratio of forces acting on them will be..