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

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

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 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.

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 -

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 ?

Two small conducting spheres have charges 2.1 nC and -0.1 nC are touched to each other and then separated by a distance of 0.5 m. Find the force between them

Two identical small conducting spheres having unequal positive charges q_1 and q_2 are separated by a distance r. If they are now made to touch each other and then separated again to the same distance, the electrostatic force between them in this case will be