ALTERNATIVE CURRENT AND DIRECT CURRENT

DIRECT CURRENT(DC)
current can be classified into direct current and alternating current

The flow of electric charge in one direction is called direct current or DC current. Direct current is generated from batteries, power supply, thermocouple, solar cell and dynamo etc.In the cells or batteries chemical energy is converted into electrical energy,however  the production of large quantity of direct current is costly

Direct current flows through conductor, such as copper wire, and may also flow through semiconductor, insulator and vacuum. In it, electric current flows in a fixed direction, which separates it from AC. Earlier DC was also called Galvanic current. DC can also be obtained from AC supply with the help of rectifier. DC is also used to charge the battery.Very large amounts of DC power are used in aluminum production and other electro chemical processes. High voltage DC is used to transmit power to remote area

ALTERNATIVE CURRENT(AC)
Alternate current leads to a periodically directional change in the flow of charge. Simple AC is used for power delivery in industries, houses and office buildings.

AC is produced with the help of an alternator or in other word we can say that the machine which is used to produce alternating current is called generator or alternator It is designed for alternating current production.The current produced can be in sine, square and triangle waveform. But the sine waveform is preferred, because the sine waveform is easier to generate, and it also makes the mathematical calculations easier.

Applications of AC

AC is used in home and office outlets.

AC production and long distance transmission are easy.

There is very little energy loss in electric power transmission at high voltage for long distances. Such a transformer can be converted from high voltage to low voltage and low voltage to high voltage.