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2.3 Transfer of thermal energy

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Question 12

Three solid copper spheres, P, Q, and R, are heated to the same temperature.

SphereDiameterSurface finish
PDDDshiny silver
Q3D3D3Dshiny silver
R3D3D3Dmatte black

Which of the following correctly shows the order of the spheres from the highest rate of emission of thermal radiation to the lowest rate of emission?

A

R, Q, P

B

R, P, Q

C

Q, R, P

D

P, Q, R

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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