Quick answer: Efficiency is the fraction of the total input energy that becomes useful output: efficiency = useful output ÷ total input, often shown as a percentage. This Physics 9-10 quiz checks energy efficiency with 10 multiple-choice questions and instant feedback; every answer comes with a short explanation.
This energy efficiency quiz for physics grades 9-10 has quick multiple-choice questions with instant feedback. Need a refresher first? Read the lesson or do the worksheet on energy efficiency.
Ten multiple-choice questions on energy stores, wasted energy, Sankey diagrams and efficiency. Choose the best option, then read the explanation, which also points out the usual mistake behind the wrong options. Do the calculations without a calculator where you can.
Level: Physics grades 9-10 (GCSE · IGCSE · O Level · Class 9-10) · Curriculum: GCSE P1, HS-PS3-4
