This key facts covers Key Facts — Power within Power for GCSE Physics. Revise Power in Energy for GCSE Physics with 14 exam-style questions and 25 flashcards. This topic appears regularly enough that it should still be part of a steady revision cycle. It is section 6 of 12 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 6 of 12
Practice
14 questions
Recall
25 flashcards
📋 Key Facts — Power
- Power = Energy / Time (P = E/t) or Power = Work done / Time (P = W/t)
- Unit of power: watt (W), where 1 W = 1 J/s
- Electrical power: P = IV, P = I²R, P = V²/R
- Energy consumed: E = Pt (in joules) or Energy (kWh) = Power (kW) × Time (h)
- Higher power = energy transferred more quickly, not necessarily more total energy
- A 60 W bulb on for 10 hours uses the same energy as a 600 W appliance on for 1 hour
- Power is a scalar quantity (no direction)
Keep building this topic
Read this section alongside the surrounding pages in Power. That gives you the full topic sequence instead of a single isolated revision point.
Practice Questions for Power
Which of the following is the correct definition of power?
State what is meant by the term 'power' in physics and state its unit.
Quick Recall Flashcards
14 questions on Power — practise free
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