_______ current is defined as current that periodically changes direction and continuously changes in magnitude

the waveform of alternating current produced by a rotating generator is called a _____ wave

A _______ is one complete sequence of voltage or current changes from zero to a positive peak, to zero then through a negative peak, then back to zero

the number of cycles occurring per second is the _______ of the current and is measured in a unit called ______

the _______ of an alternating current or a voltage is the angular distance it has moved from 0 degrees in a positive direction

the _________ is the difference in degrees of rotation between 2 alternating currents or voltages, or between a voltage and a current

an _______ is one half of an AC cycle

the time required for one cycle of events to occur is known as the _______ of alternating current

the number of complete cycles per second is the _____ of AC and is expressed in ______

the frequency of commercial current in North America is _____ hertz