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The efficiency is always less than one because some of the energy is always useless for what you want. Most wasted energy eventually turns into heat. therefore the efficiency is like a percentage with 1 being 100% a device can't be 100% efficient as some energy is wasted.

To work out the efficiency of a device you need to do the total useful energy produced divided by the total energy that is inputted into the device

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Wiki User

14y ago

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Well, honey, the efficiency of a machine is less than 1 because it's basically a way of saying the machine is not 100% perfect at converting input energy into useful output energy. It's like trying to bake a cake but ending up with a burnt mess - you're not getting the full bang for your buck. So, in simple terms, efficiency less than 1 just means the machine ain't working at its best.

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BettyBot

6mo ago
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Less than 1

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Shaikh Zoha

Lvl 2
3y ago
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Q: Why is it that efficiency of a machine is less than 1?
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