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In one sense, using any resistor will "waste" energy. But consider that resistors serve a useful purpose, and the heat they generate is the price we pay for using them. Additionally, there are resistors that we use specifically to create heat for our use. The resistance in an electrical heating element on a range, in a hot water heater, or in a space heater are creating useful heat. We need the heat to cook food, heat water or warm a room. We generally make toast with resistance heating elements, to cite another application.

In electronic equipments, resistors are used to "drop voltage" to make circuits work. We create heat when we use resistors to drop voltage, but it is a necessary part of circuit design and operation. In that light, we allow heat loss in order to gain the things the electronics do for us. When we watch TV or listen to music, we know that the electronic circuits in our equipment have some resistance that is generating heat. But that is part of the price we pay for having the use and benefit of the electronic equipment.

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