is a means by which electrical energy is transferred from one place to another for utilisation. Charges in motion constitute an electric current.
We know from electrostatics that when an isolated conductor is placed in an electric field, the charges in the conductor rearrange themselves so that the interior has no net electric field. This constitutes of a transient current, that is a current of short duration. It ceases the moment the net electric field in the conductor becomes zero.
However , to maintain a steady current, a source of emf is needed. This and other aspects of current electricity, such as resistance, are discussed in this chapter.
