Cambridge IGCSE Physics practice

Paper 3 structured question: Detection of radioactivity

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Paper

Marks

Topic

Detection of radioactivity

Exam-style question

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Paper 3Theory (Core)1 marks

Radioactive decay is a random process that can be measured using a Geiger-Muller counter.

Description

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

a
State the unit of count rate.
Your answer
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[1]

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Paper 3Theory (Core)1 marks

Description

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

a
State what a count rate of 300 counts per minute indicates about the radioactive source.
Your answer
Aim for approximately 1 distinct marking point.
[1]