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2.3 Transfer of thermal energy

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Question 46

A vacuum flask is designed to reduce the transfer of thermal energy from its hot contents to the surroundings. It consists of a double-walled glass vessel with a vacuum between the walls.

Which of the following options correctly shows how much thermal energy is transferred through the vacuum by conduction, convection, and radiation?

A

Conduction: none; Convection: none; Radiation: some

B

Conduction: none; Convection: some; Radiation: some

C

Conduction: some; Convection: none; Radiation: none

D

Conduction: some; Convection: some; Radiation: none

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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