4b Energy transfers4 Energy resources and energy transfers
Paper 1 only Papers 1 and 2
-- Papers 1 and 2 -- ✔︎ Describe energy transfers involving energy stores: • energy stores: chemical, kinetic, gravitational, elastic, thermal, magnetic, electrostatic, nuclear • energy transfers: mechanically, electrically, by heating, by radiation (light and sound) Use the principle of conservation of energy Know and use the relationship between efficiency, useful energy output and total energy output: efficiency = (useful energy output / total energy output) × 100% Describe a variety of everyday and scientific devices and situations, explaining the transfer of the input energy in terms of the above relationship, including their representation by Sankey diagrams Describe how thermal energy transfer may take place by conduction, convection and radiation Explain the role of convection in everyday phenomena Explain how emission and absorption of radiation are related to surface and temperature Practical: investigate thermal energy transfer by conduction, convection and radiation Explain ways of reducing unwanted energy transfer, such as insulation Physics Resources is independent and is not affiliated with or endorsed by Cambridge University Press & Assessment or Pearson Edexcel. Our questions are written for this site to match each course's content. They are not official exam board or past-paper questions.
