AQA GCSE Physics Absorber and Emitter Questions with Certified Answers 2023/2024

AQA GCSE Physics Absorber and Emitter Questions with Certified Answers 2023/2024 This type of surface is a good absorber and emitter of thermal radiation - correct answers Dark, rough (matt) surface This type of surface is a bad absorber and emitter of thermal radiation - correct answers Light, shiny surface In this process particles vibrate colliding with each other passing energy along. Solids are best at it, then liquids, then gases. - correct answers Conduction In this process particles move around carrying energy with them. Gases are best at it, then liquids then solids - correct answers Convection This process doesn't require a medium (substance) to transfer energy. The energy is carried in the form of waves - correct answers Radiation Factors affecting the rate of heat transfer - correct answers 1. Temperature difference to the surroundings 2. Surface area 3. Nature of surface (e.g shiny/matt) The total energy supplied to a device or an appliance. It is often electrical - correct answers Total Input Energy Energy converted by a device into the form(s) the device was designed for. - correct answers Useful energy Energy converted by a device into the form(s) the device was NOT designed for. - correct answers Wasted energy Useful energy transferred by the device divided by total energy input to the device - correct answers Efficiency Energy cannot be created or destroyed only transformed into other forms - correct answers The principle of conservation of energy Where does all energy end up eventually? - correct answers It is transferred to the surroundings, warming them in the process.