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2.3 Transfer of thermal energy

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Question 44

A student wants to investigate good and bad emitters of thermal radiation. She has the following apparatus available:

  • A small polished metal can
  • A small matte black-painted metal can of the same size and capacity
  • Two thermometers
  • A stopwatch
  • A measuring cylinder
  • A supply of hot water

Explain how the student could use this apparatus to carry out her investigation.

In your explanation, you should:

  1. Describe the experimental procedure to be followed.
  2. State two control variables needed to ensure a fair test.
  3. Describe the expected results and what they show about emission of thermal radiation.
[6]
Markscheme

2.3 Transfer of thermal energy Questions

  1. IGCSE
  2. /Physics
  3. /2.3 Transfer of thermal energy

301 exam-style questions on CIE IGCSE Physics 2.3 Transfer of thermal energy, covering 2.3.1a Thermal conductors and thermal insulators, 2.3.1b Explaining thermal conduction, 2.3.2 Convection, 2.3.3a Thermal radiation, 2.3.3b Surface colour and texture, 2.3.3c Rate of emission and absorption of radiation, and 2.3.4 Consequences of thermal energy transfer. Each one has a worked solution and a mark scheme showing where the marks go.

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