What is the efficiency of a device that gives you 10 units of useful energy for every 100 units you put in it?

A. 1

B. 0.5 What is the efficiency of a device that gives you 10 units of useful energy for every 100 units you put in it?

A. 1

B. 0.5

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Jenny Donaldson

Today, 00:13

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Lydia Thompson · Answer 1

Efficiency = (useful output) / (input). For this device, it's 0.1 or 10%. The correct answer isn't listed as one of the choices.

What is the efficiency of a device that gives you 10 units of useful energy for every 100 units you put in it?A. 1B. 0.5 What is the efficiency of a device that gives you 10 units of useful energy for every 100 units you put in it?A. 1B. 0.5