This definitions covers Key Definitions 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 5 of 12 in this topic. Make sure you can use the exact wording confidently, because definition marks are often lost through vague language.
Topic position
Section 5 of 12
Practice
14 questions
Recall
25 flashcards
📖 Key Definitions
- Power
- The rate of energy transfer or the rate of doing work. Measured in watts (W).
- Watt (W)
- The SI unit of power. 1 W = 1 joule per second (1 J/s).
- Kilowatt (kW)
- A unit of power equal to 1,000 watts. Used for most household appliances.
- Kilowatt-hour (kWh)
- A unit of energy equal to 3,600,000 J. Used by energy companies to measure electricity consumption. 1 kWh = 1 kW × 1 hour.
- Work done
- The energy transferred when a force moves an object through a distance. Measured in joules (J).