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Friday, 22 May 2026
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Physics Past Questions and Answers

Jamb 1994 Physics Questions

Question 16:
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 17:
When 100g of liquids L1 at 78°C was mixed with Xg of liquid L2 at 50°C, the final temperature was 66°C. Given that the specific heat capacity of L2is half that of L1, find x
  • A 50g
  • B 100g
  • C 150g
  • D 200g
View Answer & Explanation
Question 18:
Heat is supplied to a test tube containing 100g of ice at its melting point. The ice melts completely in 1 min.What is the power rating of the source of heat? [Latent heat of fusion of ice = 336Jg-1]
  • A 336W
  • B 450W
  • C 560W
  • D 600W
View Answer & Explanation
Question 19:
If a room is saturated with water vapour, the temperature of the room must be
  • A At 0<sup style='font-size: smaller;'>o</sup>C
  • B Above the dew point
  • C At 100<sup style='font-size: smaller;'>o</sup>C
  • D Below or at the dew point
View Answer & Explanation
Question 20:
Two similar kettles containing equal masses of boiling water are placed on a table. If the surface of one is highly polished and the surface of the other is covered with soot, Which of the following observations is correct
  • A The two kettles will cool down at the same rate
  • B The polished kettle cools down more quickly by conduction
  • C The kettle covered with soot cools down more quickly because it is a good radiator
  • D The kettle covered with soot cools down more quickly by the process of heat convection
View Answer & Explanation