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Nuclear Physics & Radioactivity
JEE Physics • 10 questions • Free on ExamBattle
Practice Questions
Q1
The binding energy per nucleon is maximum for:
- A. Uranium-238
- B. Iron-56
- C. Helium-4
- D. Hydrogen-1
Q2
In α-decay, the atomic number decreases by:
- A. 1
- B. 2
- C. 4
- D. 0
Q3
The half-life of a radioactive substance is 20 min. The fraction remaining after 1 hour is:
- A. 1/4
- B. 1/8
- C. 1/16
- D. 1/2
Q4
In nuclear fission, energy is released because:
- A. Total mass increases
- B. Products have higher binding energy per nucleon
- C. Neutrons are absorbed
- D. Protons are created
Q5
The Q-value of a nuclear reaction is positive when:
- A. Reaction is endothermic
- B. Reaction is exothermic
- C. Mass increases
- D. Energy is absorbed
Q6
β⁻ decay involves emission of:
- A. Proton and neutrino
- B. Electron and antineutrino
- C. Positron and neutrino
- D. Neutron only
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