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Wednesday, 19 August 2026
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Physics Past Questions and Answers

Topic: Elementary Modern Physics

Jamb Physics Questions - Elementary Modern Physics

Question 56:
Which of the following statements about radioactivity is true?
(i) Alpha particle is positively charged
(ii) Beta particle is negatively charged
(iii) Gamma ray is neutral
(iv) Beta particle has the same mass as helium atom
(v) Gamma ray is charged.
  • A I, ii, iii, iv only
  • B I, ii, iii only
  • C Iv and v only
  • D I, ii and v only
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Question 57:
A certain radioactive source emits radiation that was found to be deflected by both magnetic and electric fields. The radiation is?
  • A Beta rays
  • B Gamma rays
  • C X-rays
  • D Ultra-violet rays
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Question 58:
An isotope has an initial activity of 120 Bq. 6 days later its activity is 15 Bq. The half-life is?
  • A 3 days
  • B 2 days
  • C 1 day
  • D 4 days
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Question 59:
What is the name of the model of the atom that describes electrons as orbiting the nucleus in specific energy levels?
  • A Bohr model
  • B Dalton model
  • C Rutherford model
  • D Thomson model
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Question 60:
Which of the following is NOT an example of elementary modern ?
  • A Classical mechanics
  • B Quantum mechanics
  • C Special relativity
  • D Nuclear physics
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