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Additional AS Level Oscilloscope questions to try

These questions are ideal to use in a class situation - students gain a lot by discussing how to answer them.... especially if they have an oscilloscope in front of them!

1. Why should you maximize the volts/division scale when determining the amplitude of a wave form?

2. What effect does changing the volts/division scale from 1 volt per division to 5 volts per division have on the display of the incoming wave on the screen? (Does the wave amplitude increase, decrease or remain the same?)

3. What effect does changing the volts/division scale from 1 volt per division to 5 volts per division have on the incoming wave itself?

4. One cycle of a waveform occupies five divisions of an oscilloscope screen. The timebase dial is set to 1 ms/div. Calculate the frequency.

5. One cycle of a waveform occupies two divisions of an oscilloscope screen. The timebase dial is set to 5 ms/div. Calculate the frequency.

6. A waveform occupies six divisions of an oscilloscope screen when the timebase is switched off. The voltage gain is set to 0.5V/div. Calculate the peak to peak current being tested if the resistance of the circuit is known to be 10 ohm.

7. A waveform occupies two divisions of an oscilloscope screen when the timebase is switched off. The voltage gain is set to 10 mV/div. Calculate the peak current being tested if the resistance of the circuit is known to be 1 k W.

8. A waveform occupies six divisions of an oscilloscope screen when the timebase is switched off. The voltage gain is set to 0.25V/div. Calculate the rms current being tested if the resistance of the circuit is known to be 19 ohm.

9. A waveform occupies three divisions of an oscilloscope screen when the timebase is switched off. The voltage gain is set to 20 mV/div. Calculate the rms current being tested if the resistance of the circuit is known to be 1.4 kW .

10. Sketch an oscilloscope screen showing a 200 Hz frequency, 4V rms trace. Include all calculations you have done to work out what you should draw, and don't forget to indicate clearly what the timebase and voltage gain settings are!

LOJ January 2002 - revised 2008 and 2021