In any process where energy is transferred for a use, some energy is always wasted usually as heat and sound.A 100W filament light bulb is about 12% efficient.A fluorescent lamp is more efficient than a filament lamp, typically about 20% efficientIt is possible to stop some energy being wasted.For example, an electric car does not burn fuel so is more efficient than a petrol car. However, the source of electricity is power stations which are less than 40% efficient as they burn fuel.
Improving Efficiency
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Specification: AQA Physics (7407), AS-level, 3.4.1.7 Work, energy and power. Topic: Work, Energy and Power.
Key terms in this lesson
- Limit of proportionality
- The point beyond which the extension of a material is no longer directly proportional to the applied force.
More in Work, Energy and Power
- Drag Force
- Machines and Work
- Electric Motor
- Pulley System
- Efficiency
- Renewable Energy - Wind Power
- Renewable Energy - Water Power
- Renewable Energy - Solar Power
All 21 lessons in Work, Energy and Power · All AQA AS-level Physics topics