O-LevelPhysicsNuclear Physics5054/11 · May/June 2013 · Q391 Mark

A school keeps radioactive sources for use in radioactivity experiments in a laboratory. The background radiation is measured at the start of an experiment. Which statement is correct?

AThe background radiation is caused by the school's radioactive sources in the laboratory.

BThe background radiation is present when there are no radioactive sources in the laboratory.

CThe background radiation is radiation that is not detected in radioactivity experiments.

DThe background radiation is the same in laboratories in different countries.

✓ Correct answer

B: The background radiation is present when there are no radioactive sources in the laboratory.

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Topic: Nuclear Physics, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, May/June 2013 Paper 1 Variant 1, question 39.

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