A current source is an electronic circuit that delivers or absorbs an electric current which is independent of the voltage across it. A current source is the dual of a voltage source. The term current sink is sometimes used for sources fed from a negative voltage supply.
What is the source of electric current in a battery?
A baterry basically consists of electrochemical cells. When a battery is supplying electric power, its positive terminal is the cathode and its negative terminal is the anode.
What are the types of electric current?
Direct and Alternating Current. There are two different types of current in widespread use today. They are direct current, abbreviated DC, and alternating current, abbreviated AC. In a direct current, the electrons flow in one direction.