
A parallel plate capacitor of capacitance is charged to a potential by a battery. Without disconnecting the battery, the distance between the plates is tripled and a dielectric medium of is introduced between the plates of the capacitor. Explain giving reasons, how will the following be affected charge on the capacitor.

Important Questions on Electrostatic Potential and Capacitance

The electric field inside a parallel plate capacitor is . Find the amount of work done in moving a charge over a closed rectangular loop .

Figure below shows the variation of electrostatic potential with distance for a given charge distribution. From the points marked and , identically the point at which the electric field is zero. Explain your answer.

Figure below shows the variation of electrostatic potential with distance for a given charge distribution. From the points marked and , identically the point at which the electric field is maximum. Explain your answer.

Two identical plane metallic surfaces and are kept parallel to each other in air, separated by a distance of , as shown in figure below.
Surface is given a positive potential of , and the outer surface of is earthed.
What is the magnitude and direction of the uniform electric field between points and ?

Two identical plane metallic surfaces and are kept parallel to each other in air, separated by a distance of , as shown in figure below.
Surface is given a positive potential of , and the outer surface of is earthed.
What is the work done in moving a charge of from point to point .

The electric potential as a function of distance is shown in Figure below. Construct a graph of the electric field strength .

The two graphs drawn here, show the variation of electrostatic potential with ( being distance of the field point charge) for two point charges and . What are the signs of the two charges?
