O-LevelPhysicsElectricity5054/12 · May/June 2018 · Q391 Mark

An oscilloscope is used to measure potential difference (p.d.). The trace with no input connected is shown. A 1.5 V d.c. supply is connected to the oscilloscope. The Y-gain is set at 0.5 V/div. The time-base is set at 0.5 ms/div. Which trace shows a supply of 1.5 V d.c.?

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Ashort horizontal line trace 3 divisions above the center, with a dot at the initial point.

Bvertical line trace at the center of the screen.

Ccontinuous horizontal line trace 3 divisions above the center, across the width of the screen.

Ddiagonal line trace across the screen.

✓ Correct answer

C: continuous horizontal line trace 3 divisions above the center, across the width of the screen.

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Topic: Electricity, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, May/June 2018 Paper 1 Variant 2, question 39.

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