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Cambridge IGCSE Physics practice

What is the first step in calculating the corrected count rate?

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MCQ

Type

cambridge_mcq

Style

Topic

Detection of radioactivity

Exam-style question

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What is the first step in calculating the corrected count rate?.

  1. A.Measure the background count rate
  2. B.Measure the total count rate
  3. C.Subtract the background from total count
  4. D.Calculate the average count rate

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Paper 4 structured question: Detection of radioactivity

Paper 4Theory (Extended)1 marks

Description

Radiation Measurement

The scientist records the following measurements: Total Count Rate = 120 cpm, Background Count Rate = 30 cpm.

  1. a

    State the corrected count rate.

    Aim for approximately 1 distinct marking point.

    [1]