What is meant by the efficiency of a system?
A the difference between the useful energy output from the system and the total energy input
B the difference between the useful energy output from the system and the wasted energy output
C the ratio of the useful energy output from the system to the total energy input
D the ratio of the useful energy output from the system to the wasted energy output
Answer: D
The Physics behind the answer:
- Efficiency, by definition, is option D.
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