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4.3 Hazards and uses of radioactive emissions and of background radiation

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Question 22
F

A student measures a count rate of 240 counts per minute close to a radioactive source. With the source removed, the detector still records 20 counts per minute. What should the student do with the reading of 20 counts per minute?

[1]
A

Add it to 240, because the radioactive source also produces background radiation

B

Ignore it, because background radiation is the same everywhere in the UK

C

Multiply 240 by it, because it shows how sensitive the counter is to radiation

D

Subtract it from 240, because it is the count rate from background radiation

Markscheme

4.3 Hazards and uses of radioactive emissions and of background radiation Questions

  1. GCSE
  2. /Physics
  3. /4.3 Hazards and uses of radioactive emissions and of background radiation

40 exam-style questions on AQA GCSE Physics 4.3 Hazards and uses of radioactive emissions and of background radiation, covering 4.3.1 Background radiation, 4.3.2 Different half-lives of radioactive isotopes, and 4.3.3 Uses of nuclear radiation. Each one has a worked solution and a mark scheme showing where the marks go.

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