Radiation Quiz - CBSE Class 12 Physics
Free practice quiz: Radiation (CBSE Class 12 Physics). 14 multiple-choice questions with answers and explanations. Play online, no sign-up needed.
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Which type of radiation has the highest penetrating power?
- Alpha particles
- Beta particles
- Gamma rays
- X-rays
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Answer: C. Gamma rays
Gamma rays have the shortest wavelength and highest frequency among the given options, resulting in the highest penetrating power.
What is the nature of alpha radiation?
- Electromagnetic wave
- Stream of electrons
- Stream of helium nuclei
- Stream of protons
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Answer: C. Stream of helium nuclei
Alpha particles are essentially helium nuclei, consisting of two protons and two neutrons.
Describe the process of radioactive decay.
- A stable nucleus transforms into a less stable nucleus
- A stable nucleus absorbs energy
- An unstable nucleus transforms into a more stable nucleus
- An unstable nucleus releases neutrons only
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Answer: C. An unstable nucleus transforms into a more stable nucleus
Radioactive decay is the process by which an unstable atomic nucleus loses energy by emitting radiation.
A radioactive sample has a half-life of 10 years. If you start with 100g, how much remains after 30 years?
- 50g
- 25g
- 12.5g
- 0g
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Answer: C. 12.5g
After 10 years: 50g, after 20 years: 25g, after 30 years: 12.5g
Discuss the biological effects of ionizing radiation and the factors influencing these effects.
- Only beneficial effects
- Only harmful effects
- Both beneficial and harmful effects, depending on dose and type of radiation
- No effects
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Answer: C. Both beneficial and harmful effects, depending on dose and type of radiation
Ionizing radiation can cause damage to biological tissues, but low doses can also have therapeutic effects.