Mitsubishi Air Conditioning Ductless in Rochester – What is the Difference Between AC and DC Current?
Electricity is a type of energy that involves the movement of electrons along a conductor, such as a wire. The flow of electrons can occur in one direction or both directions along the wire. When electricity flows in one direction, it is referred to as direct current (DC). Alternating current (AC) is when the electrons flow in both directions — one and then the other. Batteries produce direct current, and electrical power grids that provide electricity to homes and other buildings use alternating current.
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In nature, electricity occurs only rarely, in some animals or with lightning. In the search to create electrical energy, scientists discovered that electrical and magnetic fields are related. A magnetic field near a wire causes electrons to flow in a single direction along the wire because they are repelled and attracted by the poles of the magnet. This is how DC power from a battery was born, a development that is primarily attributed to American inventor Thomas Edison's work and promotion during the 19th century.
Transformers are used wherever an electrical voltage needs to be increased or decreased. For example, they are commonly seen on electrical poles. A power plants produces electricity at a very high voltage so that it can travel great distances.
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The voltage must be reduced, however, before the electricity reaches homes and other buildings that use it to power appliances, machinery and other devices. AC also can be changed to DC by an adapter, such as the kind used to power the battery on a laptop computer.
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