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6.5 Uses and dangers of radioactivity

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Question 29

Four workers at a materials-testing site are about to leave a controlled area.

  • Worker P gets radioactive liquid on a disposable glove. The glove is removed and the hand is washed before P leaves.
  • Worker Q gets radioactive dust on a boot cover and leaves while still wearing the boot cover.
  • Worker R is exposed to gamma radiation from a sealed source. The source is returned to its shielded store before R leaves.
  • Worker S is exposed to beta radiation from a sealed source. The source is returned to its shielded store before S leaves.

Which prediction about the workers after they leave the controlled area is correct?

[1]
A

Only worker Q continues to be exposed after leaving the controlled area.

B

Workers Q, R and S continue to be exposed after leaving the controlled area.

C

Workers R and S continue to be exposed after leaving the controlled area.

D

Workers P and Q continue to be exposed after leaving the controlled area.

Markscheme

6.5 Uses and dangers of radioactivity Questions

  1. GCSE
  2. /Physics
  3. /6.5 Uses and dangers of radioactivity

97 exam-style questions on Edexcel GCSE Physics 6.5 Uses and dangers of radioactivity, covering 6.5.1 Uses of radioactivity, 6.5.2 Dangers of ionising radiation and precautions, 6.5.3 Half-life and radiation dangers, 6.5.4 Safety precautions for radiation exposure, and 6.5.5 Contamination and irradiation. Each one has a worked solution and a mark scheme showing where the marks go.

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