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Saturday, 31 October 2026
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Physics Past Questions and Answers

Jamb 1991 Physics Questions

Question 16:
How long does it take a 750W heater to raise the temperature of 1kg of water from 20oC to 50oC [specific heat capacity of water = 4200Jkg-1K-1]
  • A 84s
  • B 112s
  • C 168s
  • D 280s
View Answer & Explanation
Question 17:
The saturated vapour pressure of a liquid increases as the
  • A Volume of the liquid increases
  • B Volume of the liquid decreases
  • C Temperature of the liquid increases
  • D Temperature of the liquid decreases
View Answer & Explanation
Question 18:
The absolute temperature of a perfect gas is proportional to the average
  • A Potential energy of the molecules
  • B Seperation between the molecules
  • C Kinetic energy of the molecules
  • D Velocity of the molecules
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Question 19:
A room is heated by means of a charcoal fire, An occupant of the room standing away from the fire is warmed mainly by
  • A Convection
  • B Radiation
  • C Conduction
  • D Reflection
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Question 20:
A boy timed 30 oscillations of a certain pendulum thrice and obtained 1min. 10s, 1min. 12s and 1min. 7s respectively.The mean period of oscillation of the pendulum is
  • A 0.14s
  • B 0.43s
  • C 2.32s
  • D 6.97s
View Answer & Explanation