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16 Cards in this Set
 Front
 Back
What is the most common type of AC waveform? 
Sine waves are produced by all rotating machines. 

How many degrees are there in one complete sine wave? 
There are 360 degrees in one complete sine wave.


At what angle does the voltage reach its maximum negative value on a sine wave? 
270 degree of maximum negative negative value on a sine wave.


What is frequency? 
a complete cycle occurs in one second (Hz). Ex. a 60 Hz equals 60 sine waves in one second. 

A sine wave has a maximum value of 230 V. What is the voltage after 38˙ of rotation? 
Ei = Em x sine = 230 v x sin 38 = 230 v x .61566 = 141.60 v 

A sine wave has a voltage of 63 V after 22˙ of rotation. What is the maximum voltage reached by this wavefrom? 
Ei = Em x sine Em = Ei / sine = 63 v / sine 22 = 168.1 v 

A sine wave has a maximum value of 560 V. At what angle of rotation will the voltage reach a value of 123 V 
Ei = Em x sine sine = Ei x Em = 123 / 560 = .2196 a sine= 12.68 

A sine wave has a peak value of 433 V. What is the RMS value? 
RMS = peak x .0707 = 433 x .707 = 30.31 v 

A sine wave has a peak to peak value of 88 V. What is the average value. 
avg = peak x .637 = 88 x .637 = 56.05v 

A DC voltage has a average value of 68 V. What is the RMS value? 
avg = rms x .9 rms = avg /.9 = 68 / .9 = 61.2 

fill in the missing value? Pv Iv Deg 347 208 ? Ei = Em x sine 
sine = Ei / Em = 280 / 347 = .5994 asine = 36.82 deg 

fill in the missing value? Pv Iv Deg 780 ? 43.5 Ei = Em x sine 
= 780 x sine 43 = 536.91v 

fill in the missing value? Pv Iv Deg ? 24.3 17.6 Ei = Em x sine 
Em = Ei / sine = 24.3 / sine 17.6 = 24.3 / .30236 = 80.36 v 

fill in the missing value? P RMS Full wave 12.7 ? ?
Avg = Peak x .637 Avg = RMS x .9 
RMS = Peak / 1.414 = 12.7 / 1.414 = 8.981 then Avg = Peak x .637 = 12.7 x .637 = 8.089 

fill in the missing value? P RMS Full wave ? 53.8 ?
Avg = Peak x .637 Avg = RMS x .9 
Peak = RMS x 1.414
= 53.8 x 1.414 = 76.07 then Avg = Peak x .637 = 76.07 x .637 = 4.84 

fill in the missing value? P RMS Full wave ? ? 164.2
Avg = Peak x .637 Avg = RMS x .9 
Avg = Peak x .637 Peak = Avg / .637 = 164.2 / .637 = 257.77 then Peak = RMS x 1.414 RMS = Peak x 1.414 = 182.29 