Question detail

What is the purpose of measuring background count rate before using a radioactive source?

Try the question, check the answer, then read the explanation to understand the curriculum point.

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At a glance

MCQ

Type

practice

Style

Topic

Hazards and uses of radioactive emissions and of background radiation

Question

A. To ensure the radioactive source is safe to use
B. To determine the effectiveness of the radioactive source
C. To account for natural radiation levels in measurements
D. To compare different radioactive sources

Answer

The correct answer is C: To account for natural radiation levels in measurements.

Explanation

The correct answer is C: To account for natural radiation levels in measurements. This supports the learning objective "Interpret charts or tables showing sources of background radiation." in Background radiation because it uses the correct atomic and nuclear radiation relationship for Hazards and uses of radioactive emissions and of background radiation. The other options are less suitable because they do not match the required Background radiation idea: To ensure the radioactive source is safe to use; To determine the effectiveness of the radioactive source; To compare different radioactive sources.

Common mistake

Misinterpreting Background Radiation Sources

Students often confuse natural and artificial sources of background radiation when interpreting charts or tables.

To fix this, students should carefully review the definitions of natural and artificial sources and practice identifying them in various contexts.

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