O-LevelPhysicsElectricity5054/12 · Oct/Nov 2020 · Q381 Mark

A potential divider uses a power supply of voltage 12 V. The resistors X and Y initially have equal resistances. The resistance of X is halved. What is the change in the output voltage?

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.

A-3.0 V

B-2.0 V

C+2.0 V

D+3.0 V

✓ Correct answer

C: +2.0 V

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Topic: Electricity, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, Oct/Nov 2020 Paper 1 Variant 2, question 38.

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