Capacitors Test...

Eight drops of mercury of same radius and having same charge coalesce to form a big drop. Capacitance of big drop relative to that of small drop will be

Two spheres A and B of radius 4 cm and 6 cm are given charges of 80µC and 40µC respectively. If they are connected by a fine wire, the amount of charge flowing from one to the other is

Two insulated metallic spheres of 3µF and 5µF capacitances are charged to 300 V and 500V respectively. The energy loss, when they are connected by a wire, is

64 small drops of mercury, each of radius r and charge q coalesce to form a big drop. The ratio of the surface density of charge of each small drop with that of the big drop is

Two hollow spheres are charged positively. The smaller one is at 50 V and the bigger one is at 100 V. How should they be arranged so that the charge flows from the smaller to the bigger sphere when they are connected by a wire

A condenser of capacity 50µF is charged to 10 volts. Its energy is equal to

The respective radii of the two spheres of a spherical condenser are 12 cm and 9 cm . The dielectric constant of the medium between them is 6. The capacity of the condenser will be

The distance between the plates of a parallel plate condenser is 4 mm and potential difference is 60 volts. If the distance between the plates is increased to 12 mm, then

There is an air filled 1pF parallel plate capacitor. When the plate separation is doubled and the space is filled with wax, the capacitance increases to 2pF. The dielectric constant of wax is

A 6µF capacitor is charged from 10 volts to 20 volts. Increase in energy will be