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Revision 2.15

18th October 2011

 

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Module 1.3

AC Waves Quiz

What you should know.

  • After studying Module 1, you should:
  •   • Be able to describe waves relating to electronic systems.
  •   • Be able to describe measurements used in AC electronics
  •   • Be able to calculate AC values from other given values, relating to AC waves.

Try our quiz, based on the information you can find in Module 1. Hopefully it'll be a breeze. Submit your answers but don't be disappointed if you get answers wrong. Just follow the hints to find the right answer and learn about capacitors as you go.

AC Waves

1.

If a sine wave has a RMS voltage of 12volts, What will be its Peak to Peak voltage?
  • a) 33.94V
  • b) 8.484V
  • c) 16.9V
  • d) 15.3V

2.

What is the peak value of a sine wave whose VAV value is 15V ?
  • a) 19V
  • b) 9.5V
  • c) 21.2V
  • d) 23.5V

3.

Select the most accurate description of an AC signal
  • a) An AC signal is any complex wave
  • b) Has a rapidly changing voltage and a steady current
  • c) Has values that change above and below a particular level
  • d) An AC signal is always repetitive

4.

Complete the sentence "A sine wave...
  • a) ...has many harmonics"
  • b) ...is a complex wave"
  • c) ...consists of a fundamental only"
  • d) ...always has the same frequency"

5.

If an AC waveform has a periodic time of 2ms, what will be its frequency?
  • a) 2kHz
  • b) 500Hz
  • c) 2MHz
  • d) 50Hz

6.

Fig 1.3.1With reference to Fig 1.3.1, what is the value labelled A?
  • a) Periodic time
  • b) Amplitude
  • c) Frequency
  • d) RMS value

7.

With reference to Fig 1.3.1, if the level labelled X has a value of 2V what is the value labelled B?
  • a) The Root Mean Squared value.
  • b) The Amplitude.
  • c) The Average value.
  • d) The Peak value.

8.

Fig 1.3.2In Fig 1.3.2, how many complete cycles are shown?
  • a) 2
  • b) 3
  • c) 4
  • d) 7

9.

What value is given by the formula VPK x 0.637?
  • a) VRMS
  • b) VMAX
  • c) The Form Factor
  • d) VAV

10.

Which of the following features is true of a square wave signal?
  • a) It consists of a fundamental and an even number of harmonics.
  • b) It consists of a fundamental and a number of even harmonics.
  • c) It consists of a fundamental and a number of odd harmonics.
  • d) It never has a DC component.