Class 12 Physics · Chapter 7 · Test 3
Tracers and Particle Physics
38 MCQs
37 questions · 35 min · 37 marks
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Sample questions
The first 5 of 37. Try each one, then tap to see the answer.
Question 1
A radioactive tracer is a substance that:
- AContains radioactive nuclei that can be introduced into the body and followed with detectors
- BSlows down neutrons
- CAbsorbs all radiation
- DProduces fusion
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Answer: A
A tracer contains radioactive atoms that are absorbed by tissue and tracked by their radiation.
Question 2
A radioactive isotope can be used as a tracer because it:
- ABehaves chemically like the normal isotope
- BHas different chemical properties
- CNever decays
- DHas no mass
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Answer: A
It behaves in the same way as the stable isotope inside an organism but its radiation can be detected.
Question 3
Radio-iodine is absorbed mostly by the:
- ABones
- BLiver
- CThyroid gland
- DKidneys
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Answer: C
Iodine is absorbed mostly by the thyroid.
Question 4
Phosphorus is absorbed mostly by the:
- AThyroid
- BBones
- CLiver
- DLungs
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Answer: B
Phosphorus is absorbed mostly by bones.
Question 5
Cobalt is absorbed mostly by the:
- AThyroid
- BBones
- CBrain
- DLiver
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Answer: D
Cobalt is absorbed mostly by the liver.
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