Monitoring AC

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Monitoring AC

Take the quiz to see if you're knowledge on ac electricity is sparking!

This voltage signal has a root mean square voltage

1 point

2.8 volts

4 volts

5.7 volts

11.3 volts

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The oscilloscope below shows an ac voltage signal displaying 2 and a half cycles. If the time base is changed from 10 ms to 20 ms the screen will show

1 point

2.5 cycles

5 cycles

10 cycles

25 cycles

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The frequency of the ac voltage signal below is

1 point

5 Hz

10 Hz

20 Hz

25 Hz

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The root mean square voltage of an ac supply is approximately what percentage of the peak voltage ?

1 point

71%

50 %

14%

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An ac voltage signal is displayed on an oscilloscope shown below. The time base is switched off. The rms voltage of the signal is

1 point

20 volts

14.2 volts

10 volts

7.1 volts

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