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Definition of AC

AC or Alternating Current refers to the type of electrical current that periodically changes direction of its flow. In contrast to DC or Direct Current which flows in only one direction, AC switches the direction of the current flow back and forth at regular intervals. This alternating flow of electrical energy is measured in Hertz and is commonly used to power most home and industrial appliances and devices.

The key advantage of AC is that it can easily be converted to different voltage levels using transformers, making it more efficient for long-distance transmission. AC power is also less likely to cause electrocution than DC power due to its periodic reversals, which can cause involuntary muscular contractions and release the grip from the source of electricity.

AC is produced by power generators such as alternators, which use spinning magnets to create the flux needed to generate electricity. The produced AC output can then be stepped up or down to the desired voltage level to be distributed to the end-users. The most common AC voltage levels are 110-120V for household use in North America and 220-240V for most other parts of the world.

In summary, AC is a type of electrical current that changes direction periodically, enabling efficient distribution over long distances and reducing the risk of electrocution. Its use has become widespread due to its versatility, ease of transmission, and compatibility with most electrical appliances and devices.

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