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Sunday, 16 August 2026
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Physics Past Questions and Answers

Topic: Elementary Modern Physics

Jamb Physics Questions - Elementary Modern Physics

Question 26:
The particle that is responsible for the nuclear fission in a nuclear reactor is
  • A Neutron
  • B Prton
  • C Electron
  • D Photon
View Answer & Explanation
Question 27:
When a nucleus is formed by bringing protons and neutrons together, the actual mass of the formed nucleus is less than the sum of the masses of the energy equivalent of this mass difference is the
  • A Lost energy
  • B Work function
  • C Binding energy
  • D Stability energy
View Answer & Explanation
Question 28:
An electron makes a transition from a certain energy level Ek to the ground state E0. If the frequency of emission is 8.0 x 1014Hz The energy emitted is
  • A 8.25 x 10<sup style='font-size: smaller;'>-19</sup>J
  • B 5.28 x 10<sup style='font-size: smaller;'>-19</sup>J
  • C 5.28 x 10<sup style='font-size: smaller;'>19</sup>J
  • D 8.25 x 10<sup style='font-size: smaller;'>19</sup>J
View Answer & Explanation
Question 29:
If the uncertainty in the measurement of the position of a particle is 5.0 x 10-10m, the uncertainty in the momentum of the particle is
  • A 1.32 x 10<sup style='font-size: smaller;'>-44</sup>Ns
  • B 3.30 x 10<sup style='font-size: smaller;'>-44</sup>Ns
  • C 1.32 x 10<sup style='font-size: smaller;'>-24</sup>Ns
  • D 3.30 x 10<sup style='font-size: smaller;'>-24</sup>Ns
View Answer & Explanation
Question 30:
X rays can be used in the study of crystal structure because they
  • A Have a very long-reaching wavelength
  • B Have extremely short wavelength
  • C Are invisible
  • D Are very fast
View Answer & Explanation