An electron is released from the bottom plate (E = 10⁴ Nc^-1) Find the velocity of the electron when it reaches plate B. (e/m = 1.76 x 10¹¹ Ckg^-1).

A capacitor of capacity 10μF is subjected to charge by a battery of 10V. Calculate the energy stored in the capacitor.

A parallel plate capacitor has plate area, 25 cm⁺² and a separation of 2 mm between the plates. The capacitor is connected to a battery of 12V. Find the charge on the capacitor.

In the circuit shown in figure. Find
(i) The equivalent capacitance and
(ii) The charge stored in each capacitor

Two insulated charged copper sphere A and B have their centres separated by a distance of 50cm.
(i) What is the force of electrostatic repulsion, if the charge on each is 6.5 x 10^-7C and the radii of A and B are negligible compared to the distance of separation?
(ii) What is the force of repulsion, if each sphere is charged double the above amount and the distance between them is halved?