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Saturday, 15 August 2026
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Physics Past Questions and Answers

Topic: Melting

Jamb Physics Questions - Melting

Question 1:
In the study of physics, temperature and heat are often confused with each other. Which of the following statements correctly defines these two element?
  • A Temperature is a measure of the average kinetic energy of the molecules of a substance
  • B Heat is a measure of the total kinetic energy of the molecules in a system
  • C Different materials require different amounts of heat to cause a given change in temperature
  • D All of the above
  • E A and B only
View Answer & Explanation
Question 2:
Change of state is accompanied by change of
  • A Temperature
  • B Volume
  • C Heat content
  • D Temperatureb and volume
  • E Volume and heat content
View Answer & Explanation
Question 3:
The electromotive force obtained from a simple dynamo may be increased by
  • A Increasing the cross-sectional area of the coil
  • B Winding the coil on a soft-iron armature so as to decrease the magnetic flux through the coil
  • C Increasing the speed of rotation
  • D Making the field magnet longer
  • E Using low-resistance copper coils
View Answer & Explanation
Question 4:
The magnetic force on a charged particle moving with velocity v is
  • A Proportional to both the magnitude of the charge and the velocity v
  • B Independent of the magnitude of the charge
  • C Proportional to the velocity v only
  • D Proportional to the magnitude of the charge only
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Question 5:
A body of mass 4kg is acted on by a constant force of 12N for 3 seconds. The kinetic energy gained by the body at the end of the time is
  • A 144J
  • B 162J
  • C 81J
  • D 72J
View Answer & Explanation