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5.2.4a Half-life

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Question 24

A radioactive source has a half-life of 15 minutes.

A detector near the source shows a reading of 8000 counts per second.

Background radiation can be ignored.

What is the reading on the detector 1.0 hour later?

A

500 counts per second

B

1000 counts per second

C

2000 counts per second

D

4000 counts per second

Markscheme

5.2.4a Half-life Questions

  1. IGCSE
  2. /Physics
  3. /5.2.4a Half-life

144 exam-style questions on CIE IGCSE Physics 5.2.4a Half-life. Each one has a worked solution and a mark scheme showing where the marks go.

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