When stated as a percentage, the useful energy transferred by a device divided by the total energy supplied to the device is kno

Question

3 years ago

11

wn as the device's __________. What one word completes the sentence?

1 answer:

Verdich [7] · Answer 1 · 2022-03-19T03:39:10+03:00

Efficiency

Explanation:

Efficiency is a ratio/percentage that is useful in comparing the energy transferred by a device to the total energy supplied to it.

Percentage efficiency = $\frac{energy input}{total energy supplied}$ x 100

As with most system, none is 100% efficient.
During energy is transferred some are lost and only a little portion is used in doing actual work by the machine.
This validates the third law of thermodynamics which proposes that no system is 100% efficient.
A 100% efficiency implies total energy input is used doing all the work.
This is impossible. The bulk of the energy goes into heating the system.

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