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Why are energy-efficient devices useful?

Answer and explanation

Correct answer: They use less electricity for the same task

An energy-efficient device provides the required service while consuming less electricity than a comparable less-efficient device. Lower consumption helps conserve energy and can reduce operating costs, although actual savings depend on usage, tariffs, and the appliance. The other options contradict efficiency because greater consumption, increased wastage, or always higher bills do not define an energy-efficient device.

Related tags

Energy EfficiencyEnergy ConservationEnergy Flow In Earth SystemsEarth As A System: EnergyMatterAnd LifeEarth As A System Energy Matter And LifeScienceClass 9 Mcq

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