What
is Alternating Current?
Alternating
current (AC) is an electric current that periodically reverses direction. In an
AC circuit, the flow of electric charge periodically changes direction,
typically in a sinusoidal waveform. This means that the voltage and current
alternate between positive and negative polarities over time.
AC
is the type of electricity commonly used in residential and commercial
buildings, as well as in most electrical power generation and transmission
systems. It's favored for its ability to efficiently transmit power over long
distances using transformers, and it can be easily converted to different
voltage levels using transformers, making it suitable for a wide range of
applications.
The
frequency of the alternation, measured in hertz (Hz), determines how quickly
the current changes direction. In many regions, the standard frequency of AC
power is 50 or 60 Hz.
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