Solar power producing heat
2 marks · NormalWhich option describes the main way a solar panel is made more efficient at heating water?
- A.Painting the pipes white
- B.Placing the panel in the shade
- C.Insulating the back of the panel
- D.Using reflective materials on the inside
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Correct option: Insulating the back of the panel
Common mistakes: choosing white pipes or shade (which would decrease heating)
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Marking points
C1 · 2 marks · Correctly identifies 'Insulating the back of the panel' as the way to make the panel more efficient at heating water.
Worked solution
Insulating the back of the panel reduces heat loss, so more energy is available for heating water.