Force of attraction between two point charges `Q` and `-Q` separated by `d metre is F_(e )`. When these charges are placed on two identical spheres of radius `R = 0.3 d` whose centres are `d metre` apart , the force of attraction between them is

The force of attraction between two charged bodies depend on

Two identical spheres each of mass M and radius R are separated by a distance 3R. The force of attraction between them is proportional to

Two point charges Q and - Q //4 are separated by a distance X . Then . force between this two charge

Two identical spheres of radius R made of the same material are kept at a distance d apart. Then the gravitational attraction between them is proportional to

Two identical spheres of radius R made of the same material are kept at a distance d apart. Then the gravitational attraction between them is proportional to

The force of repulsion between two point charges is F, when they are d distance apart. If the point charges are replaced by conducted sphereas each of radius r and the charges remain same. The separation between the centre of sphere isd, then force of repulsion between them is

The force of repulsion between two point charges is F, when they are d distance apart. If the point charges are replaced by conducted sphereas each of radius r and the charges remain same. The separation between the centre of sphere isd, then force of repulsion between them is

If the distance between two dissimilar magnetic poles held d cm apart be doubled, then the force of attraction between them will be: