Noun
an electric current that reverses direction sinusoidally
Source: WordNetIn the US most household current is AC at 60 cycles per second Source: Internet
Alternating current sensing Since the basic indicator system in either an analog or digital meter responds to DC only, a multimeter includes an AC to DC conversion circuit for making alternating current measurements. Source: Internet
A power supply using a transformer with several windings, one or more rectifiers (which may themselves be vacuum tubes), and large filter capacitors provided the required direct current voltages from the alternating current source. Source: Internet
Because of the significant advantages of alternating current over direct current in transforming and transmission, electric power distribution is nearly all alternating current today. Source: Internet
A term formerly used for direct current was galvanic current. citation Alternating current main In alternating current (AC, also ac), the movement of electric charge periodically reverses direction. Source: Internet
As a result, voltage for alternating current almost never refers to the voltage at a particular instant, but instead is the root mean square (RMS) voltage, which is a way of defining an effective voltage when calculating power (RMS voltage × RMS current). Source: Internet