Quiz 1 Summary & Reviews Flashcards
AC can be transformed to
DC
and DC can not be transformed to AC
AC reverses its direction of flow at
periodic intervals
The most common AC waveform is
the sine wave
There are 360 degrees in one
complete sine wave.
One complete waveform is called a
cycle
The number of complete cycles that occur in 1 second is called
frequency
Sine waves are produce by
rotating machines.
Frequency is measured in
hertz (Hz)
The instantaneous voltage at any point on a sine wave is equal to the peak or
Maximum, voltage times the sine of the angle of rotation.
The peak to peak is the amount of voltage measured from the
positive-most peak to the negative-most peak.
The peak value is the maximum amount of voltage
attained by the waveform.
The RMS value of voltage will produce as much power as a
like amount of DC voltage
The average value of voltage is used when an
AC wave is changed into DC.
The voltage and current in a pure resistive circuit are
in phase with each other.
True power ,or watts ,can be produced only when current and voltage
are
both positive or both negative.
Resistance is AC circuits is characterized by the fact that the
the resistive part will produce heat.
There are three basic type of AC loads:
resistive , inductive, and capacitive
The electrons in an AC circuit are force toward the outside of the conductor by what?
eddy current induction in the conductor itself.
Skin effect is proportional to
frequency.
Most of the electric power generated in the world is
AC.
