Final answer:
Energy efficiency is the effectiveness of converting energy input into useful work, expressed as a ratio. One factor that affects efficiency is the technology quality, such as using compact fluorescent light bulbs which are more efficient than incandescent ones.
Step-by-step explanation:
Energy Efficiency Definition and Factors
Energy efficiency refers to the measure of how effectively the input of energy is converted into useful work or energy. Specifically, it is the ratio of useful energy or work output to the total input of energy. In any energy conversion process, such as turning electrical energy into mechanical energy or light, not all the input energy is converted into the form we want; some is invariably lost, often as waste heat. Therefore, the efficiency reflects the proportion of energy that remains useful after the conversion process.
One significant factor that affects energy efficiency is the quality of the technology and materials used in the devices or systems conducting the energy conversion. For instance, the compact fluorescent light bulb is known for its high efficiency, as it provides more light per watt of power consumed compared to traditional incandescent bulbs.
Different factors may influence the efficiency of energy conversion, such as the design of the system, presence of friction, or use of outdated technology. Ensuring devices and appliances are state of the art and properly maintained can significantly increase their efficiency, leading to energy savings and cost reductions.