Worksheet 10-AC Voltage Waveform Flashcards
Describe what an AC voltage cycle is.
A cycle is when the voltage starts at 0 then through 360 degrees of horizontal travel.
What is the unit of measurement for frequency?
Hertz is the unit of measure for frequency.
What formula does one use to determine frequency?
The mathematical formula to determine Hertz is based on the divided of a unit of frequency over the period of seconds (cycles per second).
Frequency in Hertz = 1 / Period in seconds
What device is used to plot the graphical representation of a sine wave?
An oscilloscope is used to plot waveforms graphically.
Other than a sine wave, name three other types of waveforms?
Other waveforms in electronics include square waves, sawtooth waves and triangle waves.
How would the frequency 123MHz be written out in words?
123 million cycles per second
If time or rate of wave form is frequency, how is the amplitude of an AC signal measured?
AC amplitude is referred to as peak voltage.
What is the total height of amplitude in an AC waveform called?
Peak to Peak is the total amplitude of the positive and negative peaks in one full AC cycle.
What is the total true average voltage for an AC waveform?
True average value of one cycle of AC voltage is zero.
When measuring the equivalent power output of an AC waveform to a comparable DC power output, what term is used to describe the AC measurement?
The equivalent AC power amount to a DC voltage is called the Root Mean Square value of the waveform.
How is RMS determined in an AC waveform?
RMS is derived by multiplying the peak to peak by 0.707
With a peak voltage of 12VAC, what is the effective value for this voltage?
Using 12Vpeak, the VRMS would be 12 x 0.707 = 8.48VRMS
