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2.3 Transfer of thermal energy

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Question 91

An electric heater is used to keep the water in an aquarium warm. To ensure that all of the water is heated as efficiently and evenly as possible, where should the heater be placed?

A

near the surface of the water

B

near the bottom of the tank

C

on the side wall near the top

D

floating in the upper half

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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