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Sunday, 16 August 2026
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Physics Past Questions and Answers

Topic: Quantity of Heat

Jamb Physics Questions - Quantity of Heat

Question 11:
Heat is supplied uniformly at the rate of 100W to 1.0 x 10-2kg of a liquid for 20 seconds. If the temperature of the liquid rises by 5oC, then the specific heat capacity of the liquid is
  • A 2.0 x 10<sup style='font-size: smaller;'>2</sup>Jkg<sup style='font-size: smaller;'>-1</sup>k<sup style='font-size: smaller;'>-1</sup>
  • B 2.0 x 10<sup style='font-size: smaller;'>2</sup>Jkg<sup style='font-size: smaller;'>-1</sup>
  • C 4.0 x 10<sup style='font-size: smaller;'>4</sup>Jkg<sup style='font-size: smaller;'>-1</sup>k<sup style='font-size: smaller;'>-1</sup>
  • D 4.0 x 10<sup style='font-size: smaller;'>4</sup>kg<sup style='font-size: smaller;'>-1</sup>
  • E 8.4 x 10<sup style='font-size: smaller;'>3</sup>Jkg<sup style='font-size: smaller;'>-1</sup>k<sup style='font-size: smaller;'>-1</sup>
View Answer & Explanation
Question 12:
Two liquids, P at a temperature of 20oC and Q at a temperature of 80oC have specific heat capacities of 1.0Jkg-1oC-1 and 1.5J kg-1oC-1respectively. if equal masses of P and Q are mixed in a lagged calorimeter, then the equilibrium temperature is
  • A 44<sup style='font-size: smaller;'>o</sup>C
  • B 50<sup style='font-size: smaller;'>o</sup>C
  • C 56<sup style='font-size: smaller;'>o</sup>C
  • D 60<sup style='font-size: smaller;'>o</sup>C
  • E 70<sup style='font-size: smaller;'>o</sup>C
View Answer & Explanation
Question 13:
A good calorimeter should be of
  • A Low specific heat capacity and low heat conductivity
  • B Low specific heat capacity and high heat conductivity
  • C High specific heat capacity and low heat conductivity
  • D High specific heat capacity and low heat conductivity
  • E Dull surface and low heat conductivity
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Question 14:
The specific latent heat of fusion of lead is the amount of heat required to
  • A Melt lead at its melting point
  • B Heat a unit mass of lead through 1<sup style='font-size: smaller;'>o</sup>C
  • C Change the state of a unit mass of lead at its melting point
  • D Change the state of a unit mass of lead at its boiling point
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Question 15:
When two objects P and Q are supplied with the same quantity of heat, the temperature change in P is observed to be twice that of Q. The ratio of the specific heat capacity of P to Q is
  • A 1 : 4
  • B 4 : 1
  • C 1 : 1
  • D 2 : 1
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