ELECTROSTATIC POTENTIAL AND CAPACITANCE Set 5

Three capacitors of capacitance are connected in parallel to which a capacitor of capacitance is connected in series. Effective capacitance is 3.75, then capacity of each capacitor is

A solid conducting sphere having a charge us surrounded by an uncharged concentric conducting hollow spherical shell. Let the potential difference between the surface of the solid sphere and that of the outer surface of the hollow shell be V. if the shell is now given a charge the new potential difference between the same two surface is

A slab of copper of thickness is inserted in between the plates of parallel plate capacitor as shown in figure. The separation between the plates is if , then the ratio of capacities of capacitors after and before inserting the slab will be

Three capacitors each of capacitance 1F are connected in parallel. To the combination, a fourth capacitor of capacitance 1 F is connected in series. The resultant capacitance of the system is

In the arrangement of capacitors shown in figure, each capacitor is of 9F, Then the equivalent capacitance between in points A and B is

Electric potential at the centre of a charged hollow metal sphere is

An electron enters the space between the plates of a charged capacitor as shown. The charge density on the plate is Electric intensity in the space between the plates is .A uniform magnetic field also exists in the space perpendicular to the direction of The electron moves perpendicular to both E and B without any change in direction. The time taken by the electron to travel a distance in the space is

In the given circuit of figure with steady current, the potential drop across the capacitor must be

Capacitance of a parallel plate capacitor becomes times its original value, if a dielectric slab of thickness is inserted between the plates [ is the separation between the plates]. The dielectric constant of the slab is

The electric potential at centre of metallic conducting sphere is