Q:

Why do we use AC instead of DC?

A:

In the United States alternating current, or AC, wins over direct current, or DC, as a source of electricity because it is more efficient; the voltage of the current is easy to manipulate. However, direct current is used for computers, batteries and LEDs, according to the U.S. Department of Energy.

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Alternating current, developed by Nikola Tesla, has a current that reverses 60 times per second. This creates a larger amount of induction than a current flowing continuously in one direction. Power plants send AC power efficiently to buildings at a high voltage with little resistance. A transformer then lowers the voltage for safe use with everyday products.

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