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Tuesday, 21 April 2026
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Physics Past Questions and Answers

Jamb 2007 Physics Questions

Question 21:
When an object is placed between the principal focus and the optical center of a convex lens, it could be used as a?
  • A Simple microscope
  • B Refecting lens
  • C Compound microscope
  • D Projector
View Answer & Explanation
Question 22:
The production of pure spectrum could easily be achieved using a?
  • A Glass prism with a pin
  • B Triangular prism with two convex lens
  • C Traingular prism only
  • D Triangular prism with two concave lenses
View Answer & Explanation
Question 23:
A charge 50 µc has electric field strength of 360 NC-1 at a certain point. The electric field strength due to another charge 120 µc kept at the same distance apart and in the same medium is?
  • A 864 NC<sup style='font-size: smaller;'>-1</sup>
  • B 150 NC<sup style='font-size: smaller;'>-1</sup>
  • C 144 NC<sup style='font-size: smaller;'>-1</sup>
  • D 18 NC<sup style='font-size: smaller;'>-1</sup>
View Answer & Explanation
Question 24:
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
Question 25:
The bond that forms a semiconductor is?
  • A Covalent
  • B Electrovalent
  • C Ionic
  • D Metallic
View Answer & Explanation