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4.2 Atoms and nuclear radiation

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Question 5
F

A sealed source has an activity of 4000 Bq. A detector placed near the source records a count rate of 250 counts per second.

a.

Radioactive decay is a random process. Explain what this means.

[2]
b.

Describe the difference between the activity of the source and the count rate recorded by the detector.

[2]
c.

Suggest why the count rate is much lower than the activity.

[1]
Markscheme

4.2 Atoms and nuclear radiation Questions

  1. GCSE
  2. /Physics
  3. /4.2 Atoms and nuclear radiation

40 exam-style questions on AQA GCSE Physics 4.2 Atoms and nuclear radiation, covering 4.2.1 Radioactive decay and nuclear radiation, 4.2.2 Nuclear equations, 4.2.3 Half-lives and the random nature of radioactive decay, and 4.2.4 Radioactive contamination. Each one has a worked solution and a mark scheme showing where the marks go.

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