What is a dielectric ?

What is the dielectric constant of conducting materials?

What is the dielectric constant of a metal? Give reason.

A parallel plate air capacitor has a capacitance of 2pF. Now, the separation between the plates is doubled, and the space is filled with wax. If the capacitance rises to 6pF, what is the dielectric constant of wax?

What are the advantages of using a solid insulator as a dielectric of a capacitor?

When a slab of insulating material 4 mm thick is introduced between the plates of a parallel plate capacitor, it is found that the distance between the paltes has to be increased by 3.5 mm in order to restore the conductor capacity to its original value. What is the dielectric constant of the insulating meterial?

Two identical charged spheres are suspended by strings of equal lengths. The strings make an angle 30^@ with each other. When suspended in a liquid of density 800 kg/ m^3 , the angle remains the same. What is the dielectric constant of the liquied? The density of the material of the sphere is 1600 kg/ m^3 .

The area of parallel capacitor with air as dielectric medium is 125.6 cm^2 and the separation between the two plates of the capacitor is 2 cm. What will be the radius of a sphere having its capacitane equal to that of the parallel plate capacitor?

X and Y are two parallel plate capacitors having the same area of plates and same separation between the plates. X has air between the plates and Y contains a dielectric medium of k =5 What is the ratio of electrostatic energy stroed in X and Y?

Two parallel plates of area 100 cm^2 are given equal and opposite charges of 10^(-7)C . The space between the plates is filled with a dielectric material, and the electric field within the dielectric is 3.3xx10^5 V. m^(-1) . What is the dielectric constant of the dielectric?