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4.3 Hazards and uses of radioactive emissions and of background radiation

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Question 17
F

Source R has a half-life of 2 hours and source S has a half-life of 2000 years. Both contain the same number of undecayed nuclei at the start. A technician handles each source for one hour. Which source gives the larger dose, and why?

[1]
A

Source R, because a far larger number of its nuclei decay in that hour

B

Source S, because its nuclei carry on decaying for thousands of years

C

Source R, because its radiation is more penetrating than that of source S

D

Source S, because it contains more undecayed nuclei at the end of the hour

Markscheme

4.3 Hazards and uses of radioactive emissions and of background radiation Questions

  1. GCSE
  2. /Physics
  3. /4.3 Hazards and uses of radioactive emissions and of background radiation

40 exam-style questions on AQA GCSE Physics 4.3 Hazards and uses of radioactive emissions and of background radiation, covering 4.3.1 Background radiation, 4.3.2 Different half-lives of radioactive isotopes, and 4.3.3 Uses of nuclear radiation. Each one has a worked solution and a mark scheme showing where the marks go.

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