In Figure E, look at the isolated charged spheres with distribution of negative charge. One is silver and the other is rubber. Identify each and explain your answer.

Two identical conduction spheres, one having an initial charge +Q and the other initially uncharged, are brought into contact. (a) What is the new charge on each sphere? (b) While the spheres are in contact, a positively chaged rod is moved close to one sphere, causing a redistribution of hte charges on the two spheres so the charge on hte sphere closest to the rod has a charge-Q. What is the charge to the other sphere?

A conducting sphere carrying charge Q is surrounded by a spherical conducting shell. a. What is the net charge on the inner surface of the shell? b. Another charge q is placed outside the shell. Now, what is the net charge on the inner surface of the shell? c. If q is moved to a position between the shell and the sphere, what is the net charge on the inner surface of the shell? d. Are your answer valid if the sphere and shell are not concentric?

An electrically isolated hollow (initially uncharged), conducting sphere has a small positively charged ball suspended by an insulating rod from its inside surface, see diagram This causes the inner surface of the sphere to become negatively charged. When the ball is centred in the sphere the electric field outside the conducting spehere is

Two copper spheres of the same radii one hollow and the other solid are charged to same potential then

Two copper spheres of the same radii one hollow and the other solid are charged to same potential then

Two isolated metallic solid spheres of radii R and 2R are charged such that both of these have same charge density sigma . The spheres are located far away from each other and connected by a thin conducting wire. Find the new charge density on the bigger sphere.

A spherical capacitor has the inner sphere of radius 2 cm and the outerone of 4 cm . If the inner sphere is earthed and the outer one is charged with a charge of 2muC and isolated. Calculate ltbr. (a) the potential to which the outer sphere is raised. (b) the charge retained on the outer surface of the outer sphere.

Does the charge given to a metallic sphere depend on whether it is hollow or solid ? Give reason for your answer.

A charge Q is uniformly distributed on a thin spherical shell. What is the field at the centre of the shell? If a point charge is brought close to the shell, will the field at the centre change? Does your answer depend on whether the shell is conducting or nonconducting?

Two charged conducting spheres of radii a and b are connected to each other by a wire. What is the ratio of electric fields at the surface of two spheres ? Use the result obtained to explain why charge density on the sharp and pointed ends of a conductor is higher than on its fatter portions ?