The unidirectional flow of an electric charge is known as direct current. Direct current can flow via conductors like wires, but it can also flow through semiconductors and even a vacuum. Electric current is distinguished from alternating current by the fact that it flows in a constant direction.
Sources of direct current
- In direct current, the current flows in one direction only. Some sources of direct current are cell, DC generator, etc.
- Dry cell, dry cell battery, car battery and DC generator, radio and television works only with D.C they have a device in them which convert A.C supplied to them into D.C.
- The DC current is the current which does not change the direction with time.