1. Using Cathode Ray Oscilloscopes (CRO’s)
5V ac
Use the scale (and units) to work out the answers
Ac must go above and below the line
0.02s
The time for one wave is called the period
-4V dc
3v ac

2. If the ac is not centred (half above and half below the middle line) you should measure the vertical
distance from top to bottom of the wave and halve your answer.
50V dc
20V ac
2.5V ac
2V ac
4V ac
2V ac

3. Answers on next slides

4. Using Cathode Ray Oscilloscopes (CRO’s)
5V ac
4Volts dc
Use the scale (and units) to work out the answers
Ac must go above and below the line
0.5s
0.02s
The time for one wave is called the period
-4V dc
3v ac

5. If the ac is not centred (half above and half below the middle
line) you should measure the vertical distance from top to
bottom of the wave and halve your answer.
50V dc
20V ac
2.5V ac
2V ac
4V ac
2V ac