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5.2 Radioactivity

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Question 7

When working with a gamma-emitting radioactive source, which of the following measures does not reduce the radiation dose received by a user?

A

Handling the source with long-handled tongs to increase distance.

B

Reducing the total duration of time spent near the source.

C

Storing the source in a container filled with ice to lower its temperature.

D

Placing a thick lead screen between the source and the worker.

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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