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2.3.1a Thermal conductors and thermal insulators

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Question 33

Three students are discussing the mechanism of thermal conduction in different materials.

They each propose a hypothesis:

  1. I think the aluminum rod will be a good thermal conductor because it contains free electrons that can rapidly move and transfer kinetic energy.
  2. I think the plastic rod will be a good thermal conductor because its atomic structure allows electrons to move freely throughout the material.
  3. I think the ceramic rod will be a poor thermal conductor because thermal energy can only be transferred through lattice vibrations as there are no free electrons.

Which of their hypotheses are correct?

A

1 and 2 only

B

1 and 3 only

C

2 and 3 only

D

1, 2 and 3

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2.3.1a Thermal conductors and thermal insulators Questions

  1. IGCSE
  2. /Physics
  3. /2.3.1a Thermal conductors and thermal insulators

67 exam-style questions on CIE IGCSE Physics 2.3.1a Thermal conductors and thermal insulators. Each one has a worked solution and a mark scheme showing where the marks go.

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