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Utilize background radiation measurements to calculate a corrected count rate.

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  • Practise with linked questions.
Cambridge IGCSE PhysicsNuclear physicsSupplement content

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Quick explanation

Utilize background radiation measurements to calculate a corrected count rate

  • This point belongs to Detection of radioactivity, especially Detection of radioactivity outcomes.
  • You need to be able to utilize background radiation measurements to calculate a corrected count rate.
  • The key ideas to know are Use and Determine.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

UseDetermine

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This objective helps connect Detection of radioactivity outcomes to exam-style questions, flashcards, and revision notes for Detection of radioactivity.

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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]
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