Two conducting spheres carry equal charges. the distance between the spheres cannot be considered large in comparison with the diameters of the spheres. In which case will the force of interaction between the spheres be greater (in absolute value): when they carry like charges (Figure (a)) or when they carry unlike charges (Figure (b))?

In two cases, two identical conducting sphere are given equal charges, in one case of the same type whereas in another case of opposite type. The distance between the spheres is not large comparing with the diameter. Let F_(1) and F_(2) be the magnitudes of the force of interaction between the spheres, as shown, then

When apositively charged sphere is brought near a metallic sphere, it is observed that a force of attraction exists between the two. If means:

When a positively charged sphere is brought near a metallic sphere, it is observed that a force of attraction exists between the two. It means that

Two identical conducting spheres 1 and 2 carry equal amounts of charge and are ficed apart at a certain distance larger than their diameters. The spheres repel each other with an electrical force of 88mN. A thired identical sphere 3, having an insulating handle and initially uncharged, is touched first to sphere 1 and then to sphere 2 and finally removed. Find the force between spheres 1 and 2 as shown if Figure. ,

A small sphere carries a charge of 20muC . The energy density of electric field at a point 25 cm away from the centre of the sphere in air is

Two conducting spheres of radius R and 3R carry charges Q and -2 Q . Between these spheres a neutral conducting sphere of radius 2R is connected. The separation between the sphere is considerably large Charge flows through conducting wire due to potential difference. The final charge on initially neutral conducting sphere is :

An insulating rod carries some net charge, and a copper sphere is neutral. The rod and the sphere do not touch. Can there be force of attration/repulsion between the two?

A charge q is to be distributed on two conducting spheres. What should be the value of the charges on the spheres so that the repulsive force between them is maximum when they are placed at a fixed distance from each other in air ?