The Table shows information about two lamps that give out the same amount of light.
Table
| Lamp | Input power in W\text{W}W | Useful power output (light) in W\text{W}W |
|---|---|---|
| filament lamp | 60 | 6.0 |
| LED lamp | 7.5 | 6.0 |
Calculate the energy wasted by the filament lamp in 1.0 hour.
Explain why the LED lamp heats its surroundings less than the filament lamp.
Give one advantage and one disadvantage of the heating effect of the current in the filament lamp.
105 exam-style questions on Edexcel GCSE Physics 10.3 Electrical energy and power, covering 10.3.1 The heating effect of an electric current, 10.3.2 Reducing energy transfer in wires, 10.3.3 Advantages and disadvantages of the heating effect, 10.3.4 Energy transferred by an electrical circuit, 10.3.5 Electrical power, and 10.3.6 Energy transfers in domestic devices. Each one has a worked solution and a mark scheme showing where the marks go.