Two point charges separated by a distance d repel each other with a force of 10 N. If the separation between them becomes d/2, the force of repulsion will be ______.
Two unlike charges attract each other with a force of 10N. If the distance between them is doubled, the force between them is :
Two identical copper spheres carrying charges +Q and -9Q separated by a certain distance has attractive force F, if the spheres are allowed to touch each other and moved to distance of separation 'x', so that the force between them becomes 4F/9. Then x is equal to
Two positive ions, each carrying a charge q, are. separated by a distance d. If F is the force of repulsion between the ions, the number of electrons missing from each ion will be: