Answer ALL questions. Look for any feedback given if you get an answer incorrect. Keep choosing an answer until you get it correct. CORRECT or INCORRECT answers are indicated at the TOP of the page. A score is given at the TOP of the page when the exercise has been completed.
Identify the formula for calculating RMS voltage
RMS = Vmax / (1 / √2)
RMS = Vmax (1 / √2)
RMS = Vmax / (2 / π)
RMS = Vmax (π / 2)
Identify the formula for calculating AVERAGE voltage
AVERAGE = Vmax / √2
AVERAGE = √2 / Vmax
AVERAGE = Vmax (2 / π)
AVERAGE = Vmax / (2 / π)
Identify the approximate number value for RMS
0.1717
0.7717
0.1777
0.7071
Identify the approximate number value for AVERAGE
0.6636
0.6366
0.3666
0.6633
An AC voltage has a max. peak voltage of 220v. Calculate the RMS voltage value
156v
220v
99v
102v
An AC voltage has a max. peak voltage of 220v. Calculate the AVERAGE voltage value
130v
220v
140v
190v
An AC voltage has an RMS voltage value of 220v. Calculate the max. peak voltage value
356v
410v
311v
180v
An AC voltage has an AVERAGE voltage value of 220v. Calculate the max. peak voltage value
415v
346v
305v
200v
An AC voltage has a max. peak voltage of 1000v. Calculate the RMS voltage value
707v
1200v
695v
820v
An AC voltage has a max. peak voltage of 650v. Calculate the AVERAGE voltage value
430v
520v
414v
390v
Identify the correct degrees at which the maximum positive peak AC voltage occurs
0 degrees
180 degrees
90 degrees
45 degrees
Identify the correct degrees at which the maximum negative peak AC voltage occurs
180 degrees
270 degrees
90 degrees
360 degrees
On an AC waveform, zero volts occur at
45 degrees
270 degrees
90 degrees
180 degrees
An AC waveform has a max. peak voltage of 100v. At which degrees from the selection below does +70.7v occur
90 degrees
45 degrees
160 degrees
190 degrees
An AC waveform has a max. peak voltage of 100v. At which degrees from the selection below does -70.7v occur
360 degrees
165 degrees
225 degrees
180 degrees
An AC waveform has a max. peak voltage of 100v. At which degrees from the selection below does +70.7v occur
90 degrees
135 degrees
150 degrees
180 degrees
An AC waveform has a max. peak voltage of 100v. Calculate the Instantaneous voltage that occurs at 175 degrees
95.85v
45.5v
8.72v
0v
An AC waveform has a max. peak voltage of 100v. Calculate the Instantaneous voltage that occurs at 90 degrees
75v
45v
65v
100v
An AC waveform has a max. peak voltage of 100v. Calculate the Instantaneous voltage that occurs at 88 degrees
99.94v
75.55v
58.74v
110v
An AC waveform has a max. peak voltage of 200v. Calculate the Instantaneous voltage that occurs at 275 degrees
-99.94v
-199.23v
-170.94v
110.94v
Identify the formula for calculating the Instantaneous voltage (Vinst) value on an AC waveform
Vinst = Vmax Sin θ
Vinst = Vmax Cos θ
Vinst = Vmax / Sin θ
Vinst = Vmax / Cos θ
Identify the formula for calculating RMS voltage
RMS = Vmax / (√2)
RMS = Vmax (√2)
RMS = Vmax / (2 / π)
RMS = Vmax (π / 2)
Identify the formula for calculating Vmax (peak) voltage
Vmax = RMS / (1 / √2)
Vmax = RMS (1 / √2)
Vmax = RMS / (2 / π)
Vmax = RMS (π / 2)
An AC circuit has an Instantaneous voltage of 199.186v at 60 degrees. Calculate the RMS voltage value of the circuit
162.63v
199.98v
150.5v
230v
An AC circuit has an Instantaneous voltage of 143.214v at 99 degrees. Calculate the RMS voltage value of the circuit
102.53v
135.28v
150.77v
175.36v
An AC circuit has an Instantaneous voltage of 4.7121v at 179 degrees. Calculate the AVERAGE voltage value of the circuit
171.88v
135.28v
150.44v
165.56v
An AC circuit has an Instantaneous voltage of 196.962v at 80 degrees. Calculate the AVERAGE voltage value of the circuit
127.32v
115.58v
100.44v
92.66v
An AC circuit has an Instantaneous voltage of minus 375.877v at 250 degrees. Calculate the Peak voltage value of the circuit
minus 400v
400v
minus 500v
500v
An AC circuit has an Instantaneous voltage of minus 215.091v at 325 degrees. Calculate the Peak voltage value of the circuit
minus 375v
375v
minus 230v
230v
Identify the formula for calculating Vmax (peak) voltage