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Cambridge IGCSE Physics practice

What does a count rate of 100 counts per minute mean?

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Show answerDetection of radioactivity revisionRevise the key idea

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MCQ

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cambridge_mcq

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Topic

Detection of radioactivity

Exam-style question

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What does a count rate of 100 counts per minute mean?.

  1. A.100 decays occur in one minute
  2. B.100 decays occur in one second
  3. C.100 decays occur in one hour
  4. D.100 decays occur in one day

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Paper 3 structured question: Detection of radioactivity

Paper 3Theory (Core)1 marks

Description

Count Rate Measurement

A Geiger-Muller counter measures the count rate of a radioactive source. The count rate is recorded as 150 counts per minute.

  1. a

    State the unit of count rate.

    Aim for approximately 1 distinct marking point.

    [1]