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Monday, 17 August 2026
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Physics Past Questions and Answers

Topic: Quantity of Heat

Jamb Physics Questions - Quantity of Heat

Question 16:
22,000J of heat is required to raise the temperature of 1.5kg of paraffin from 20oC to 30oC. Calculate the specific heat capacity of paraffin.
  • A 1466Jkg<sup style='font-size: smaller;'>-1</sup><sup style='font-size: smaller;'>o</sup>C<sup style='font-size: smaller;'>-1</sup>
  • B 2933Jkg<sup style='font-size: smaller;'>-1</sup><sup style='font-size: smaller;'>o</sup>C<sup style='font-size: smaller;'>-1</sup>
  • C 4400Jkg<sup style='font-size: smaller;'>-1</sup><sup style='font-size: smaller;'>o</sup>C<sup style='font-size: smaller;'>-1</sup>
  • D 5866Jkg<sup style='font-size: smaller;'>-1</sup><sup style='font-size: smaller;'>o</sup>C<sup style='font-size: smaller;'>-1</sup>
View Answer & Explanation
Question 17:
In which of the following are the substance arranged in descending order of their thermal conductivities?
  • A Copper, steel, glass
  • B Steel, copper, glass
  • C Steel, glass, copper
  • D Copper, glass, steel
View Answer & Explanation
Question 18:
The amount of heat needed to raise the temperature of 10kg of copper by 1k is its
  • A Specific heat capacity
  • B Heat capacity
  • C Latent heat
  • D Internal energy
View Answer & Explanation
Question 19:
An electric heater is used to melt a block of ice of mass 1.5kg. If the heater is powered by a 12V battery and a current of 20A flows through the coil, calculate the time taken to melt the block of ice at 0oC. [specific latent heat of fusion of ice = 336 x 103Jkg-1]
  • A 76.0min
  • B 35.0min
  • C 21.0min
  • D 2.9min
View Answer & Explanation
Question 20:
What is the difference in the amount of heat given out by 4kg of steam and 4kg of water when both are cooled from 100oC to 80oC? [the specific latent heat of steam is 2,260,000Jkg-1, specific heat capacity of water is 4200Jkg-1K-1]
  • A 4200J
  • B 2,260,OOOJ
  • C 9,040,000J
  • D 9,380,000J
View Answer & Explanation