SINUSOIDAL ALTERNATING WAVEFORMS
Alternating waveforms
-The term alternating indicates only that the wave form prescibed levels in a set time sequence.
Polarites and Direction
Characteristics Sinusoidal ac Voltage
Instantaneous value
Waveform
Peak amplitude
Peak value
Peak-to-peak value
Periodic waveform
Period(T)
Cycle
Frequency
Sinusoidal Waveform
-The velocity with which the radius vector rotates about the center,called the angular velocity,can be determined from the following equation:
:
-The quantity π is the ratio of the circumference of a circle to its diameter
-For 180° and 360°,the two units of measurement are related as follows:
General Format for Sinusoidal Voltage or Current
Phase Relationship
-The term lead and lag are used to indicate the relationship between two sinusoidal waveforms of the same frequency plotted on the same set of axes
Effective(rms) Value
Average Value