A combination of two conducting bodies separated by insulator can store electric charge : The above device is called…………………

A combination of two conducting bodies separated by insulator can store electric charge : Derive on expression for capacitance of the de vice with air as medium

A device to store electrical charge is called.

A pair of equal and opposite charges sepa-rated by a small vector distance forms an electric dipole:- An electric dipole consisting of charges +20 mu C and -20 mu C separated by 2 mm is placed inside a cubi-cal box of side 10 cm. What is net electric flux passing though the box?

(a) Explain the meaning of the statement electric charge of a body is quantised. (b) Why can one ignore quantisation of electric charge when dealing with macroscopic ie. Large scale charges?

Two metal plates X and Y of the area A are separated by a distance .d. The plates are charged +Q and -Q respectively. This arrangement is called…………………………..