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5.2 Radioactivity

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Question 164

A laboratory technician is carrying out an experiment to measure the radiation emitted by a source.

Three safety proposals are made to reduce the technician's exposure to ionizing radiation:

  1. Handle the radioactive source using long-handled tongs.
  2. Stand as close as possible to the radioactive source during the experiment.
  3. Place a lead screen between the source and the technician.

Which of these proposals are correct ways to minimise safety risks?

A

1 and 2 only

B

1 and 3 only

C

2 and 3 only

D

1, 2 and 3

Markscheme

5.2 Radioactivity Questions

  1. IGCSE
  2. /Physics
  3. /5.2 Radioactivity

484 exam-style questions on CIE IGCSE Physics 5.2 Radioactivity, covering 5.2.1 Background radiation and measuring count rate, 5.2.2a Alpha, beta and gamma emission, 5.2.2b Deflection and ionising effects of nuclear radiation, 5.2.3a Radioactive decay, 5.2.3b Effects of decay on the nucleus and decay equations, 5.2.4a Half-life, 5.2.4b Choosing isotopes for applications, and 5.2.5 Effects of ionising radiation and safety precautions. Each one has a worked solution and a mark scheme showing where the marks go.

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