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1 markRadioactivity

CAPE Physics Unit 2 · 2002 · Paper 1 · Question 9(b)(i)

Figure 11 shows measurements of the decay rate of a sample of radioactive substance over time.

Use the graph in Figure 11 to determine the background count rate.

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Other parts of this question

  1. 9(a)(i)Explain what is meant by activity of a radioactive source, and state its corresponding unit.[2 marks]
  2. 9(a)(ii)Explain what is meant by decay constant, and state its corresponding unit.[2 marks]
  3. 9(a)(iii)Explain what is meant by half life, and state its corresponding unit.[2 marks]
  4. 9(b)(ii)Use the graph in Figure 11 to determine the half life of the substance.[1 mark]
  5. 9(b)(iii)Use the graph in Figure 11 to determine the decay constant.[2 marks]

More practice: the rest of this paper · more Radioactivity questions · all CAPE Physics Unit 2 past papers