A-LevelPhysicsWaves9702/12 · May/June 2010 · Q51 Mark
The diagram shows a square-wave trace on the screen of a cathode-ray oscilloscope. A grid of 1 cm squares covers the screen. The time-base setting is 10 ms cm⁻¹. [Figure 5.1] What is the approximate frequency of the square wave?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
A70 Hz
B140 Hz
C280 Hz
D1400 Hz
✓ Correct answer
B: 140 Hz
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