O-LevelPhysicsElectricity5054/11 · Oct/Nov 2019 · Q391 Mark

The diagram shows the trace on an oscilloscope screen when connected to a d.c. supply which is being switched on and off. The settings of the Y-gain control and the time base control are shown. The voltage of the supply is v. The supply is switched on f times per second. What are the values of v and of f? v/V f 2 50 2 100 4 50 4 100

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.

Av=2 V, f=50

Bv=2 V, f=100

Cv=4 V, f=50

Dv=4 V, f=100

✓ Correct answer

C: v=4 V, f=50

Oracle Prep sorts past-paper questions by topic, so you can drill Electricity and see which topics are most likely to come up next.

Topic: Electricity, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, Oct/Nov 2019 Paper 1 Variant 1, question 39.

Questions and mark schemes are from past examination papers and remain the copyright of the exam board. How Oracle Prep builds its content