Pearson Edexcel International GCSE (9–1) · PHYSICS · Unit
Energy Resources and Energy Transfers
175 practice questions
Topics covered
Practice questions
61–70 of 90 · Normal
Question 61
2 marks · Normal
Answer and see the solution →Give two reasons why it is important to use more renewable energy resources instead of fossil fuels.
Question 62
3 marks · Normal
Answer and see the solution →The table shows the start-up cost and annual electricity output for different renewable energy resources used in a town.
Resource Start-up cost (thousand $) Annual output (MWh) Wind turbine 80 180 Solar farm 60 100 Hydroelectric 150 350 (a)[1 mark]Which resource gives the highest annual electricity output?
(b)[2 marks]Which resource has the lowest start-up cost per 1 MWh annual output? Show your working.
Question 63
1 mark · Normal
Answer and see the solution →Name one example of a renewable resource used to generate electricity that does not produce greenhouse gases during operation.
Question 64
4 marks · Normal
Answer and see the solution →A house uses solar heating panels to warm its water supply.
(a)[2 marks]Explain how a solar heating panel uses the Sun’s energy to heat water.
(b)[2 marks]State two features of a solar heating panel that help it absorb as much energy from the Sun as possible.
Question 65
4 marks · Normal
Answer and see the solution →Figure 1 shows a diagram of a simple solar heating panel.
Figure 1: Simple solar heating panel structure (a)[1 mark]Name the main energy transfer that takes place in the solar heating panel.
(b)[1 mark]Suggest one reason why the pipes in the panel are often painted black.
(c)[2 marks]Describe one way the panel’s design helps to reduce heat loss to the surroundings.
Question 66
4 marks · Normal
Answer and see the solution →A solar panel provides hot water for a family during summer.
(a)[2 marks]Give one advantage and one disadvantage of using solar heating panels for this purpose.
(b)[2 marks]A panel is placed on the roof facing south in the UK. Explain why.
Question 67
4 marks · Normal
Answer and see the solution →The table shows the temperature rise of water in a solar heating panel at different times of day.
Temperature change with time for a solar panel (summer day) Time (h) Temperature rise (°C) 08:00 2 10:00 6 12:00 12 14:00 13 16:00 8 18:00 3 (a)[1 mark]At what time is the temperature rise greatest?
(b)[1 mark]Between which two times does the water temperature rise the fastest?
(c)[2 marks]Suggest a reason why the rate of water heating falls after 14:00.
Question 68
4 marks · Normal
Answer and see the solution →A student suggests painting the inside of a solar panel white instead of black.
(a)[1 mark]Predict the effect this would have on the efficiency of the panel.
(b)[3 marks]Explain your prediction.
Question 69
4 marks · Normal
Answer and see the solution →A solar heating panel is covered with a glass sheet and insulated at the back.
(a)[2 marks]State the function of the glass sheet.
(b)[2 marks]What is the purpose of insulation at the back of the panel?
Question 70
2 marks · Normal
Answer and see the solution →Which 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