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6.5 Uses and dangers of radioactivity

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Question 27
H

A sterilisation plant replaces its gamma source with another source of the same isotope. The replacement has twice the activity. Packages pass through at the same distance from the source. Assume the dose received is proportional to source activity multiplied by exposure time. Which change gives each package its original dose?

[1]
A

Double the conveyor speed to halve the exposure time.

B

Halve the conveyor speed to double the exposure time.

C

Double the conveyor speed to double the exposure time.

D

Halve the conveyor speed to halve the exposure time.

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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