Generators can produce alternating or direct current.
Direct Current (DC) is a current which flows in one direction only. All batteries produce direct current.
Alternating Current (AC) is one which flows in two opposite directions alternately. This means that the direction of current flowing in a circuit is constantly being reversed back and forth.
The electric current supplied to our homes is alternating current. This comes from power plants that are operated by the electric company.
The types of current can be differentiated by looking at the pattern produced on Oscilloscope.
The pattern above is produced by Alternating Current. Direct current will produce straight line only.
AC can be converted to DC by using AC/DC converter. This is used by many equipments such as computers.
