Direct Current (DC)
- Direct Current originate because of movement of electrons in a conductor in one direction.
- In DC case, electrons don’t change their direction and keep on moving in one direction.
- A magnetic field near a wire causes the electrons in the wire to flow in one direction along the wire. The reason of movement of electrons is because they are repelled and attracted by the poles of the magnet.
- DC current was invented by Thomas Edison.
- DC batteries we use in the cars based on this phenomena.
Alternating Current (AC)
- When electrons in a conductor moves in two directions than AC current generates.
- AC current was invented by Nikola Tesla , a Serbian scientist.
- Instead of applying the magnetism along the wire steadily (in one direction), he used a magnet that was rotating.In other words changing its direction.
- When the magnet was oriented in one direction, the electrons start to flow towards positive direction and when magnet oriented in opposite direction, they begin to move in opposite direction.
- That’s the reason alternating current keeps on changing its polarity.
The Question is ???
- Now the question arises that when we had Direct Current , then whats.’s the need of Alternating Current ???
- Answer to this question is DC stores very low energy that’s why we can’t use it for long distances but the AC current can easily move to very long ranges.
- You have observed that all those thing where we need current just on the spot we use DC, such as in the cars. We are generating DC and using it at the same spot.
- But when there’s a need to send energy at long distance we use AC such as in our house, all the energy coming from Power Plant to our houses is AC.
- There is also a limit of range for AC and for that reason we use transformers, which acts as a recharger and makes the energy of AC high again.
So, that’s all about Difference Between AC and DC Power. I hope you guys got something out of it. Let me know did you like it. Thanks.