What is AC and DC current in electricity?

There are two ways in which current flows through the movement of an electron in a wire. One is that the electron moves forward from one end of the wire to the other and the other electron stays in one place and retreats 30 times in a second. The current that flows continuously is called direct current or DC and the current flowing through the back of an electron is called 'alternate current' i.e. AC.

When a light bulb or a device is connected between AC or DC currents, the current is stopped and energy like heat and light is generated in it. In the old days both AC and DC power supplies were sent. Electricity can be sent far away from AC current and it is easy to change the quantity by using a transformer so the power supply is sent from AC current only. There is no change in AC or DC current in some equipment. Electric motors run on both AC and DC currents. However the composition of the two is different.

DC power is used in equipment that uses light current. The power cell and battery provide DC power. The current in our house comes from AC current. Adapters are used to convert it into DC current to be used in small appliances.