Easyphysics

 GCSE Science - AQA
P1a Energy and Electricity
 Index
 Glossary

Did you know? 

The Energy-Saver bulb converts electrical energy into more light and less heat compared to ordinary filament light bulb. It also lasts longer.

 

      

 P1a Energy flow diagrams 

Syllabus Summary Questions Answers


1. a) 40 J  -  b) 32 J   -   c) 8 J 

2. The energy transformed by the computer ...

  • becomes difficult to use for other energy transformations

  • ends up very spread out

  • ends up making the surroundings a little warmer

3.      
 Devices  Input energy  Useful energy  Waste energy
 TV  Electrical   Light - Sound  Heat
 Car engine  Chemical   Kinetic - Light  Sound - Heat
 Gas cooker  Chemical  Heat - Light  Sound
 Washing machine  Electrical   Kinetic - Light  Sound - Heat