Question Paper
Class / Subject: Class 10 (ICSE) · Physics
Chapter: Chapter 12 — Chapter 12: Radioactivity
Time Allowed: 32 minutes
Max Marks: 16
1. What are alpha particles? [1]
(A) Helium nuclei (2 protons, 2 neutrons)
(B) Electrons
(C) Photons
(D) Neutrons only
2. What is the penetration power of alpha particles? [1]
(A) Low
(B) High
(C) Highest of all three
(D) Moderate
3. What are beta particles? [1]
(A) High-speed electrons
(B) Helium nuclei
(C) Photons
(D) Protons only
4. What are gamma rays? [1]
(A) High-energy electromagnetic radiation
(B) Helium nuclei
(C) Electrons
(D) Protons only
5. Which has the highest penetration power? [1]
(A) Gamma rays
(B) Alpha particles
(C) Beta particles
(D) All are equal
6. Which has the highest ionising ability? [1]
(A) Alpha particles
(B) Gamma rays
(C) Beta particles
(D) None ionise
7. What is a medical application of radioactivity? [1]
(A) Cancer treatment and diagnostics
(B) Only cooking
(C) Only lighting
(D) No medical use
8. What is carbon dating used for? [1]
(A) Determining the age of ancient materials
(B) Cooking food
(C) Generating electricity only
(D) Lighting rooms
9. What are alpha particles? [1]
(A) Helium nuclei (2 protons, 2 neutrons)
(B) Electrons
(C) Photons
(D) Neutrons only
10. What is the penetration power of alpha particles? [1]
(A) Low
(B) High
(C) Highest of all three
(D) Moderate
11. What are beta particles? [1]
(A) High-speed electrons
(B) Helium nuclei
(C) Photons
(D) Protons only
12. What are gamma rays? [1]
(A) High-energy electromagnetic radiation
(B) Helium nuclei
(C) Electrons
(D) Protons only
13. Which has the highest penetration power? [1]
(A) Gamma rays
(B) Alpha particles
(C) Beta particles
(D) All are equal
14. Which has the highest ionising ability? [1]
(A) Alpha particles
(B) Gamma rays
(C) Beta particles
(D) None ionise
15. What is a medical application of radioactivity? [1]
(A) Cancer treatment and diagnostics
(B) Only cooking
(C) Only lighting
(D) No medical use
16. What is carbon dating used for? [1]
(A) Determining the age of ancient materials
(B) Cooking food
(C) Generating electricity only
(D) Lighting rooms