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6.2 Uses and hazards

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Question 15
F

Two radioactive sources, X and Y, start with the same number of unstable nuclei. Source X has a half-life of 2 minutes2\ \text{minutes}2 minutes. Source Y has a half-life of 2 years2\ \text{years}2 years.

Which statement about the hazard from the sources is correct?

[1]
A

X has a lower activity at first, but it stays hazardous for much longer

B

Y has a higher activity at first, and it stays hazardous for much longer

C

X has a higher activity at first, but it is hazardous for only a short time

D

Y has a lower activity at first, and it is hazardous for only a short time

Markscheme

6.2 Uses and hazards Questions

  1. GCSE
  2. /Physics
  3. /6.2 Uses and hazards

48 exam-style questions on OCR GCSE Physics 6.2 Uses and hazards, covering 6.2.1 Contamination and irradiation, 6.2.2 Half-life and radiation hazards, 6.2.3 Medical uses of nuclear radiation, 6.2.4 Nuclear fission and chain reactions, and 6.2.5 Nuclear fusion. Each one has a worked solution and a mark scheme showing where the marks go.

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