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Sunday, 21 June 2026
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Physics Past Questions and Answers

Topic: using the theory to explain:

Jamb Physics Questions - using the theory to explain:

Question 21:
From the kinetic theory of gases, temperature is a
  • A Form of energy and is proportional to the total kinetic energy of the molecules
  • B Form of energy and is proportional to the average kinetic energy of the molecules
  • C Physical property and is proportional to the total kinetic energy of the molecules
  • D Physical property and is proportional to the average kinetic energy of the molecules
View Answer & Explanation
Question 22:
When a radiation strikes a metal surface, electrons may be ejected from the metal. The maximum kinetic energy which may be acquired by an ejected electron depend on the
  • A Intensity of the radiation
  • B Source of the radiation
  • C Wavelength of the radiation
  • D Detection device of the electron
View Answer & Explanation
Question 23:
The pressure of a gas when cooled at constant volume will decrease because the molecules
  • A Collide less frequently with the walls of the container
  • B Have the same average kinetic energy
  • C Break up into smaller molecules
  • D Decrease in number
View Answer & Explanation
Question 24:
A rocket burns fuel at the rate of 10kgs-1 and ejects it with velocity of 5 x 103ms-1. The thrust exerted by the gas on the rock is
  • A 2.5 x 10<sup style='font-size: smaller;'>7</sup>N
  • B 5.0 x 10<sup style='font-size: smaller;'>4</sup>N
  • C 5.0 x 10<sup style='font-size: smaller;'>2</sup>N
  • D 2.0 x 10<sup style='font-size: smaller;'>-3</sup>N
View Answer & Explanation
Question 25:
When the volume of a given mass of gas is halved and its temperature doubled, the pressure
  • A Remains constant
  • B Increases by a factor of 4
  • C Increases by a factor of 3
  • D Decreases by a factor of 4
View Answer & Explanation