Question detail
Why is alpha radiation suitable for use in smoke alarms?
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. It has high penetration power.
- B. It is easily absorbed by smoke.
- C. It can travel long distances.
- D. It is less ionising than beta radiation.
Answer
The correct answer is B: It is easily absorbed by smoke..
Explanation
The correct answer is B: It is easily absorbed by smoke.. This supports the learning objective "Describe how alpha radiation is used in some smoke alarms." in Uses of nuclear 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 Uses of nuclear radiation idea: It has high penetration power.; It can travel long distances.; It is less ionising than beta radiation..
Common mistake
Misunderstanding Alpha Radiation in Smoke Alarms
Students often confuse alpha radiation with beta or gamma radiation, thinking all types are used in smoke alarms.
Review the properties of alpha radiation, including its ionising ability and low penetration, to understand why it is specifically used in smoke alarms.
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