Alternating Current Flashcards
The most common of all AC waveforms is the ________
Sine wave
The sine wave contains a total of 360 electric degrees. It reaches its peak positive voltage at ________, returns to a value of 0 volts at ________, increases to its maximum negative voltage at ________, and returns to 0 volts at ________
90 degrees, 180 degrees, 270 degrees, 360 degrees
Each complete waveform of 360 degrees is called a ________
Cycle
The number of complete cycles that occur in 1 second is called the ________ and is measured in ________
Frequency; hertz (Hz)
The ________ is measured from the maximum value in the positive direction to the maximum value in the negative direction
Peak-to-peak value
The ________ is measured from zero to the highest value obtained in either the positive or negative direction
Peak value, or amplitude
The ________ at any point on a sine wave is equal to the peak, or maximum voltage times the sine of the angle of rotation
Instantaneous voltage
The ________ of voltage will produce as much power as a like amount of DC voltage
RMS value
The ________ and ________ in a pure resistive circuit are in phase with each other
Current; voltage
The ________ of voltage is used when an AC sine wave is changed into DC
Average value
_______ can be produced only when current and voltage are both positive or both negative
True power, or watts
Resistance in AC circuits is characterized by the fact that the resistive part will ________
Produce heat
Name the three basic types of AC loads
Resistive, inductive, and capacitive
In an AC circuit, the ________ is a phenomenon that causes electrons to be forced to the outer surface of conductors by the AC induced eddy currents
Skin effect
How many degrees are there in one complete sine wave?
360 degrees
