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Tuesday, 27 October 2026
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Physics Past Questions and Answers

Jamb 1998 Physics Questions

Question 21:
A vapour is said to be saturated when
  • A More molecules return to the liquid than the amount that left it
  • B A dynamic equilibrium exists between the molecules of the liquid and the vapour molecules at a given temperature
  • C The vapour pressure is equal to the atmospheric pressure
  • D All molecules are moving with the same speed in all directions at a given temperature
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Question 22:
One valid assumption of the kinetic theory of gasses is the
  • A The molecules of a gas are constantly in a state of motion and the number of collision remains constant
  • B The number of molecule of gas increases with increasing pressure
  • C As the temperature increases, the number of collision made by the gas molecule remains constant
  • D The molecules of gas are all identical and are very small in size
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Question 23:
The physical properties of sound waves can best be described by
  • A Reflection and diffraction
  • B Polarization and reflection
  • C Polarization and diffraction
  • D Polarization and refraction
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Question 24:
In a closed organ pipe producing a musical note, an antinode will always be produced at
  • A The closed end
  • B The open end
  • C The middle
  • D All the parts of the pipe
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Question 25:
A steel wire of length 0.50m is stretched between two fixed points and its fundamental frequency is 200Hz. The speed of the wave in the wire is
  • A 100ms<sup style='font-size: smaller;'>-1</sup>
  • B 120ms<sup style='font-size: smaller;'>-1</sup>
  • C 200ms<sup style='font-size: smaller;'>-1</sup>
  • D 250ms<sup style='font-size: smaller;'>-1</sup>
View Answer & Explanation