The table shows three appliances operating at constant power.
| Appliance | Power in W\mathrm{W}W | Time in min\mathrm{min}min |
|---|---|---|
| P | 2000 | 3 |
| Q | 500 | 15 |
| R | 100 | 60 |
Which comparison of electrical energy transferred is correct?
P and R receive equal energy; Q receives more.
P and Q receive equal energy; R receives more.
P and R receive equal energy; Q receives less.
Q and R receive equal energy; P receives less.
81 exam-style questions on Edexcel GCSE Physics 10.4 Mains electricity, covering 10.4.1 Direct and alternating current, 10.4.2 Live, neutral and earth wires; safety, 10.4.3 Mains wire potential differences and dangers, and 10.4.4 Power ratings and energy use. Each one has a worked solution and a mark scheme showing where the marks go.