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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 26:
The kinetic theory of photoelectron liberated from a metallic surface depends on the
  • A Intensity of the incident radiation
  • B Time duration of the incident radiation
  • C Temperature of the incident radiation
  • D Frequency of the incident radiation
View Answer & Explanation
Question 27:
A Motor Tyre is inflated to pressure of 2.0 x 105Nm-2 when the temperature of air is 27oC. What will be the pressure in it at 87oC assuming that the volume of the Tyre does not change?
  • A 2.6 x 10<sup style='font-size: smaller;'>5</sup>Nm<sup style='font-size: smaller;'>-2</sup>
  • B 2.4 x 10<sup style='font-size: smaller;'>5</sup>Nm<sup style='font-size: smaller;'>-2</sup>
  • C 2.2 x 10<sup style='font-size: smaller;'>5</sup>Nm<sup style='font-size: smaller;'>-2</sup>
  • D 1.3 x 10<sup style='font-size: smaller;'>5</sup>Nm<sup style='font-size: smaller;'>-2</sup>
View Answer & Explanation
Question 28:
The volume of an air bubble increases from the bottom to the top of a lake at constant temperature because
  • A Atmospheric pressure acts on the surface of the lake
  • B Pressure increases with depth
  • C Density remains constant with pressure
  • D The bubble experiences an upthrust
View Answer & Explanation
Question 29:
Temperature is the measure of the
  • A Quantity of heat transferred into the molecules of an object
  • B Mean kinetic energy of the molecules of the object
  • C Kinetic energy of any individual molecule of the substance
  • D Amount of work done by the molecules of the object
View Answer & Explanation
Question 30:
The equation PxVyTz = constant in charles' law when
  • A X = 1, y = -1, z = 1
  • B X = 0, y = 1, z = -1
  • C X = 1, y = 0, z = -1
  • D X = 0, y = 1, z = 1
View Answer & Explanation