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5.2.1 Background radiation and measuring count rate

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Question 9

A radioactive source is placed near a radiation detector connected to a counter.

A total of 480 counts are recorded by the counter in 6 minutes.

The background count rate is 25 cpm25\text{ cpm}25 cpm (counts per minute).

What is the corrected count rate for the radioactive source?

A

55 cpm55\text{ cpm}55 cpm

B

80 cpm80\text{ cpm}80 cpm

C

105 cpm105\text{ cpm}105 cpm

D

455 cpm455\text{ cpm}455 cpm

Markscheme

5.2.1 Background radiation and measuring count rate Questions

  1. IGCSE
  2. /Physics
  3. /5.2.1 Background radiation and measuring count rate

44 exam-style questions on CIE IGCSE Physics 5.2.1 Background radiation and measuring count rate. Each one has a worked solution and a mark scheme showing where the marks go.

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