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Cambridge IGCSE Physics practice

Paper 3 structured question: Detection of radioactivity

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Detection of radioactivity

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Paper 3Theory (Core)1 marks

A radioactive source emits particles that are detected by a Geiger-Muller counter.

Description

Radioactive Source Activity

The Geiger-Muller counter shows a count rate of 300 counts per minute. This indicates the activity level of the radioactive source.

  1. a

    State what a count rate of 300 counts per minute indicates about the radioactive source.

    Aim for approximately 1 distinct marking point.

    [1]

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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]