O-LevelPhysicsNuclear Physics5054/11 · May/June 2023 · Q371 Mark

The diagram shows how the thickness of paper is measured during manufacture. If the sheet is too thick, fewer beta-particles can reach the detector. Why are beta-particles used for this purpose?

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.

AAlpha-particles are all stopped by the paper.

BAlpha-particles make the paper radioactive.

CGamma radiation is all stopped by the paper.

DGamma radiation is only produced by sources with a short half-life.

✓ Correct answer

A: Alpha-particles are all stopped by the paper.

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Topic: Nuclear Physics, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, May/June 2023 Paper 1 Variant 1, question 37.

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