Two spheres carrying charges `+6muC and +9muC`, separated by a distance d, experiences a force of repulsion F. When a charge of `-3muC` is given to both the spheres and kept at the same distance as before, the new force of repulsion is

Two spheres carrying charges +6muC and +9muC ,separated by distance d, experiences a force of repulsion F. When a charge of -3muC is given to both the spheres and kept at the same distance as before, the new force of repulsion is

Two spheres carrying charges + 6 mu C and 9 mu C , seperated by a distance d , experience a force of repulsion F . When a charge of - 3 mu C is given to both the sphere and kept at the same distance as before , the new force of repulsion is

Two identical metal spheres having charges +q and +q respectively. When they are separated by distance r, exerts force of repulsion F on each other. The spheres are allowed to touch and then moved back to same separation. The new force of repulsion will be

Two identical metal spheres having charges +q and +q respectively. When they are separated by distance r, exerts force of repulsion F on each other. The spheres are allowed to touch and then moved back to same separation. The new force of repulsion will be

There are two charges +1 muC and +5muC , separated by a distance of 0.2 m in air, the ratio of forces acting in them will be:

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 carrying charges of +3muC and -3 muC attract each other with a force F. If charge +3muC is added to both, the force between the balls will be :

Charges of 10 muC and 15 muC are separated by a certain distance. Which charge repels the other with a greater force?