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6.5 Uses and dangers of radioactivity

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Question 19
F

Two sealed gamma sources have the same activity when placed in storage. Source P has a half-life of 2 days. Source Q has a half-life of 20 years. Which comparison is correct after 8 days?

[1]
A

Neither has lost much of its activity; both need precautions for similar times.

B

P has lost most of its activity; Q needs precautions for much longer.

C

Q has lost most of its activity; P needs precautions for much longer.

D

Both have lost most of their activity; both need precautions for similar times.

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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