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Wednesday, 28 October 2026
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Physics Past Questions and Answers

Jamb 1997 Physics Questions

Question 16:
The length of mercury thread when it is at 0°C, 100°C and at an unknown temperature \(\theta\) is 25mm, 225mm and 175mm respectively. The value of \(\theta\) is
  • A 85.0<sup style='font-size: smaller;'>o</sup>C
  • B 80.0<sup style='font-size: smaller;'>o</sup>C
  • C 75.0<sup style='font-size: smaller;'>o</sup>C
  • D 70.0<sup style='font-size: smaller;'>o</sup>C
View Answer & Explanation
Question 17:
Equal masses of copper and rubber are raised to the same temperature. After sometimes, the copper was observed to be at a lower temperature because
  • A The specific heat capacity of copper is lower than that of rubber
  • B Copper expands more than rubber
  • C The specific heat capacity of rubber is lower than that of copper
  • D Rubber expands more than copper
View Answer & Explanation
Question 18:
Before starting a journey, the tyre pressure of a car was 3 x 105Nm-2 at 27oC. At the end of the journey, the pressure rose to 4 x 105Nm-2. Calculate the temperature of the tyre after the journey, assuming the volume is constant
  • A 400<sup style='font-size: smaller;'>o</sup>C
  • B 300<sup style='font-size: smaller;'>o</sup>C
  • C 273<sup style='font-size: smaller;'>o</sup>C
  • D 127<sup style='font-size: smaller;'>o</sup>C
View Answer & Explanation
Question 19:
What happens when a, certain quantity of pure ice is completely changed to water at 0oC?
  • A Latent heat is absorbed, the mass remains constant, and the volume decreases
  • B Latent heat is given out, the mass remains constant and the volume decreases
  • C Latent heat is given out, the mass increases and the volume remains constant
  • D Latent heat is absorbed, the mass decreases and the volume increases
View Answer & Explanation
Question 20:
A heating coil rated at 100W is used to boil off 0.5kg of boiling water. The time taken to boil off the water is [specific latent heat of vaporization of water = 2.3 x 106Jkg-1]
  • A 1.15 x 10<sup style='font-size: smaller;'>9</sup> s
  • B 1.15 x 10<sup style='font-size: smaller;'>7</sup> s
  • C 1.15 x 10<sup style='font-size: smaller;'>5</sup> s
  • D 1.15 x 10<sup style='font-size: smaller;'>4</sup> s
View Answer & Explanation