AC Waveform Analysis Quiz

What is the term for the point where the waveform starts to repeat itself?

• Cycle

• Alternation

• Average

• Peak

What is an alternation in a sine wave?

• The instantaneous value

• The average value

• Half of a cycle

• The top of the waveform

What is the peak value of a sine wave?

• The top of the waveform

• The average value

• The instantaneous value

• Half of a cycle

What is the formula to calculate the average value for one alternation of a sine wave?

• Peak value x 0.8

• Peak value x 0.5

• Peak value x 0.707

• Peak value x 0.637

What is the average value of a complete sine wave?

• Negative Peak value

• RMS value

• Peak value

• Zero

How do you determine the peak value of a cosine wave at a given angle?

• Cosine of theta divided by P

• Sine of theta times P

• Cosine of theta times P

• Tangent of theta times P

What is the effective value of a waveform if the peak value is 50 volts?

• 55.5 volts

• 25.5 volts

• 45.5 volts

• 35.5 volts

What does RMS stand for in the context of AC waveform analysis?

• Rapid Mean System

• Rough Mean Solution

• Real Mean Standard

• Root Mean Squared

What is the RMS value of a waveform with a peak current of 40 amps?

• 28.28 amps

• 36.36 amps

• 32.32 amps

• 24.24 amps

What is the purpose of calculating the RMS value of an AC waveform?

• To determine the maximum voltage

• To measure the average current

• To compare with equivalent DC voltage for heating effect

• To find the instantaneous value