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.

This CBSE Class 12 Physics practice quiz has 14 multiple-choice questions on Radiation, and 14 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

Sample questions

1. Which type of radiation has the highest penetrating power?

   1. Alpha particles
   2. Beta particles
   3. Gamma rays
   4. X-rays
   Show answer

   Answer: C. Gamma rays

   Gamma rays have the shortest wavelength and highest frequency among the given options, resulting in the highest penetrating power.

2. What is the nature of alpha radiation?

   1. Electromagnetic wave
   2. Stream of electrons
   3. Stream of helium nuclei
   4. Stream of protons
   Show answer

   Answer: C. Stream of helium nuclei

   Alpha particles are essentially helium nuclei, consisting of two protons and two neutrons.

3. Describe the process of radioactive decay.

   1. A stable nucleus transforms into a less stable nucleus
   2. A stable nucleus absorbs energy
   3. An unstable nucleus transforms into a more stable nucleus
   4. An unstable nucleus releases neutrons only
   Show answer

   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.

4. A radioactive sample has a half-life of 10 years. If you start with 100g, how much remains after 30 years?

   1. 50g
   2. 25g
   3. 12.5g
   4. 0g
   Show answer

   Answer: C. 12.5g

   After 10 years: 50g, after 20 years: 25g, after 30 years: 12.5g

5. Discuss the biological effects of ionizing radiation and the factors influencing these effects.

   1. Only beneficial effects
   2. Only harmful effects
   3. Both beneficial and harmful effects, depending on dose and type of radiation
   4. No effects
   Show answer

   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.

More questions in this quiz

Answers and explanations are in the full quiz.

1. Which type of radiation is the least ionizing?
2. Beta particles are essentially:
3. Explain the inverse square law as applied to radiation intensity.
4. What is the half-life of a radioactive substance?
5. How does shielding protect against radiation?
6. Derive the relationship between activity and decay constant in radioactive decay.
7. Explain the concept of radioactive equilibrium in a radioactive series.
8. Compare and contrast the different types of radiation detectors and their applications.
9. A complex decay chain involves multiple radioactive isotopes. How can you analyze and model such a system to predict the long-term behavior of the chain?

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