Question detail
Why is it important to measure the background count rate before using a radioactive source?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Hazards and uses of radioactive emissions and of background radiation
Question
- A. To ensure the source is safe
- B. To calibrate the measuring equipment
- C. To determine the half-life of the source
- D. To subtract it from the measured count rate
Answer
The correct answer is D: To subtract it from the measured count rate.
Explanation
The correct answer is D: To subtract it from the measured count rate. This supports the learning objective "Compare natural and artificial sources of background radiation using data." 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 source is safe; To calibrate the measuring equipment; To determine the half-life of the source.
Common mistake
Confusing Sources of Background Radiation
Students often confuse natural sources of background radiation, such as cosmic rays and radon gas, with artificial sources like medical uses and nuclear power.
To fix this, students should create a clear list categorizing sources of background radiation into natural and artificial, ensuring they understand examples of each.
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