Column-I gives certain situations involving two thin conducting shells connected by a conducting wire via a key K. In all situation one sphere has net charge +q and other sphere has no net charge. After the key K is pressed, column-II gives some resulting effect.

Column I gives certain situations involving two thin conducting shells connected by a conducting wire via a key K. In all situations, one sphere has net charge +q and other sphere has not net charge. After the key K is pressed, column II gives some resulting effects. Match the figures in Column I with the statement in Column II.

The two conducting spherical shells are joined by a conducting wire and cut after some time when charge stops flowing. Find out the charge on each sphere after that.

The two conducting spherical shells are joined by a conducting wire and cut after some time when charge stops flowing. Find out the charge on each sphere after that.

The two conducting spherical shells are joined by a conducting wire and cut after some time when charge stops flowing. Find out the charge on each sphere after that.

The circuit involves two ideal cells connected to a 1 mu F capacitor via a key K. Initially the key K is in position 1 and the capacitor is charged fully by 2V cell. The key is then pushed to position 2. Column I gives physical quantities involving the circuit after the key is pushed from position 1. Column II gives corresponding results. Match the statements in Column I with the corresponding values in Column II. {:(" Column I ",,,"Column II"),("(A) The net charge crossing the 4 volt cell in "mu"C is",,,"(p) 2"),("(B) The magnitude of work done by 4 Volt cell in " mu "J is",,,"(q) 6"),("(C) The gain in potential energy of capacitor in " mu "J is ",,,"(r) 8"),("(D) The net heat produced in circuit in " mu"J is ",,,"(s) 16"):}

The circuit involves two ideal cells connected to a 1 mu F capacitor via a key K. Initially the key K is in position 1 and the capacitor is charged fully by 2V cell. The key is then pushed to position 2. Column I gives physical quantities involving the circuit after the key is pushed from position 1. Column II gives corresponding results. Match the statements in Column I with the corresponding values in Column II. {:(" Column I ",,,"Column II"),("(A) The net charge crossing the 4 volt cell in "mu"C is",,,"(p) 2"),("(B) The magnitude of work done by 4 Volt cell in " mu "J is",,,"(q) 6"),("(C) The gain in potential energy of capacitor in " mu "J is ",,,"(r) 8"),("(D) The net heat produced in circuit in " mu"J is ",,,"(s) 16"):}

Two conducting spheres of radius r_(1) =8 cm and r_(2) =2 cm are separated by a distance much larger than 8 cm and are connected by a thin conducting wire as shown in the figure . A total charge of Q=+100 nC is placed on one of the spheres . After a fraction of a second the charge Q is redistributed and both the spheres attain electrostatic equilibrium . (a) Calculate the charge and surface charge density on each sphere. (b) Calculate the potential at the surface of each sphere .