The Table shows the power ratings of some appliances used in a home.
Table
| Appliance | Power rating in W\text{W}W |
|---|---|
| kettle | 2200 |
| toaster | 800 |
| television | 120 |
| LED lamp | 8 |
Explain which appliance transfers the most energy in one minute.
Calculate the energy transferred by the toaster in 2.5 minutes.
The kettle is used to heat some water.
Describe the changes in energy stores that take place when the kettle is used.
The LED lamp is switched on for 5.0 hours. The kettle is switched on for 3.0 minutes.
A student says:
'The LED lamp transfers more energy than the kettle because it is switched on for longer.'
Deduce whether the student is correct.
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.