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Nuclear physics questions and answers

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Apt for A level students wanting to test themselves in the Chapter - Nuclear Physics. This is a topic wise quiz with detailed answers provided underneath each question. complete revision of Nuclear physics for 12th grade.

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  • July 21, 2023
  • 2
  • 2022/2023
  • Exam (elaborations)
  • Questions & answers
  • Secondary school
  • 5
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Physics


Quiz
1. A beam of β-particles is passed in a vacuum. through the electric field between a pair of
oppositely charged metal plates. How will the particles move? 2 marks
Ans: curved path (deflected/attracted)
towards positively charged plate OR in opposite direction to field



2. Describe the path of γ-rays in a magnetic field. 1 mark
Ans: not deflected

3. When a nucleus of a certain isotope of uranium is bombarded by a suitable neutron, it splits
into two smaller nuclei and energy is released. What is this process? 1 mark
Ans: fission



4. An atom of an isotope is unstable and decays into a different element by emitting a beta-
particle. What is the one thing about the atom that stays the same and one thing that
changes?
Ans:
Changes: mass (number) OR nucleon number OR (number of) nucleons OR (number of)
protons plus (number of) neutrons

Stays the same: proton number OR atomic number OR (number of) neutrons OR (number
of) protons / neutrons / electrons OR position in periodic table OR chemical properties OR a
neutron changes into a proton


5. Which type of radiation, α, β or γ, is the most strongly ionizing and why? 2 marks
Ans: α

Alpha particles are highly ionizing because of their double positive charge, large mass
(compared to a beta particle) and because they are relatively slow. They can cause multiple
ionization within a very small distance.

larger charge
slower moving
more massive greater volume/ more chance of collision
more energy



6. State any two environmental issues involved in the storage of radioactive materials with
very long half-lives. 2 marks
Ans:

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