This exam focus covers Exam Focus: Power within Power for GCSE Physics. Revise Power in Energy for GCSE Physics with 14 exam-style questions and 25 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 10 of 12 in this topic. Treat this as a marking guide for what examiners are looking for, not just a fact list.
Topic position
Section 10 of 12
Practice
14 questions
Recall
25 flashcards
🎯 Exam Focus: Power
How this topic appears in exams:
- Calculation questions (2-4 marks): Calculate power from energy and time, or rearrange to find time or energy
- Electrical power (2-3 marks): Use P = IV or P = I²R to calculate electrical power
- Energy cost (3-4 marks): Calculate kWh used and find the cost of electricity
- Comparing appliances (2 marks): Explain why a higher-power appliance is not always more expensive to run
- Unit conversions: Convert minutes to seconds, kW to W, etc.
Always show your working and include units at every step. Marks are awarded for substitution and correct units even if the final answer is wrong.