Final answer:
The statement is true; an appliance that lowers power consumption during peak demand is indeed considered a smart device. These devices can adjust their power use in response to energy demand, contributing to energy saving and efficiency.
Step-by-step explanation:
True or False? An appliance that lowers power consumption during peak demand is considered a smart device. This statement is true. A smart device is typically characterized by its capability to connect, share, and interact with its user and other devices. This includes the ability to adjust operations in response to variables such as energy demand. During peak energy demand times, such devices can reduce their power usage to alleviate stress on the power grid and lower energy costs, an action known as demand response.
Understanding that energy consumed is a product of power and time enables us to make better decisions regarding energy efficiency. High-power devices that operate for long durations, like water heaters and air conditioners, are significant contributors to energy consumption. In contrast, devices like toasters, despite their high power, are used for such short periods that they have less impact on overall energy use. Similarly, electric clocks, despite being on all the time, consume very little power. Utilizing devices with greater efficiencies, like a compact fluorescent light bulb which offers more light per watt compared to an incandescent bulb, can also contribute to energy saving.
Appliances designed to generate heat, like microwave ovens and space heaters, typically require a lot of power. The power rating of an appliance, measured in watts, does not depend on how long the appliance is on but represents the maximum power draw while it is operating. Upgrading to more efficient appliances can provide substantial energy savings over time, as evidenced by the example of replacing an old refrigerator with a new, lower wattage model.