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5.2 Radioactivity

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Question 78

Which radioactive source is used in an industrial system to monitor the thickness of paper sheets, and what is the reason for this choice?

A

Source: β\betaβ; Reason: its transmission is highly sensitive to small thickness variations

B

Source: β\betaβ; Reason: its transmission is virtually unaffected by small thickness variations

C

Source: γ\gammaγ; Reason: its transmission is highly sensitive to small thickness variations

D

Source: γ\gammaγ; Reason: its transmission is virtually unaffected by small thickness variations

Markscheme

5.2 Radioactivity Questions

  1. IGCSE
  2. /Physics
  3. /5.2 Radioactivity

484 exam-style questions on CIE IGCSE Physics 5.2 Radioactivity, covering 5.2.1 Background radiation and measuring count rate, 5.2.2a Alpha, beta and gamma emission, 5.2.2b Deflection and ionising effects of nuclear radiation, 5.2.3a Radioactive decay, 5.2.3b Effects of decay on the nucleus and decay equations, 5.2.4a Half-life, 5.2.4b Choosing isotopes for applications, and 5.2.5 Effects of ionising radiation and safety precautions. Each one has a worked solution and a mark scheme showing where the marks go.

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