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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 31:
The binding energy of helium He is
4
2




[atomic mass of proton = 1.00783U,
atomic mass of neutron = 1.00867U]
  • A 4.033U
  • B 2.017U
  • C 0.033U
  • D 0.330U
View Answer & Explanation
Question 32:
One of the properties of gamma rays is that they are?
  • A Neutral
  • B Massive
  • C Positively charged
  • D Negatively charged
View Answer & Explanation
Question 33:
I. The number of neutrons released exceeds the number that caused the fission.
II. There is loss of mass.
III. Energy is produced.
IV. Smaller nuclei merge to form larger nuclei
which of the statement above are correct about nuclear fission?
  • A II,III and IV only
  • B I, II and IV only
  • C I,II and III only
  • D I, III and IV only
View Answer & Explanation
Question 34:
A radioactive substance has a half-life of 20 days what fraction the original radiation nuclei will remain after 80 days?
  • A (1)/32
  • B (1)/16
  • C (1)/ 8
  • D (1)/4
View Answer & Explanation
Question 35:
The energy E of a photon and it's wavelength are related by Eλ = X. the numerical value of X is?
[h = 6.63 x 10-34js, c = 3 x 108 ms-1]
  • A 6.6 X 10<sup style='font-size: smaller;'>-28</sup>
  • B 1.99 X 10<sup style='font-size: smaller;'>-27</sup>
  • C 6.60 x 10<sup style='font-size: smaller;'>-26</sup>
  • D 1.99 x 10<sup style='font-size: smaller;'>-25</sup>
View Answer & Explanation