Physics
JAMB 1979
Which of the following statements defines correctly the efficiency of a machine?
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A.
the load carried by the machine divided by effort required in carrying the load
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B.
the distance moved by the load divided by the distance moved by the effort
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C.
the useful work done by the machine divided by the total work put into the machine
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D.
the movement of the load divided by the movement of the effort about the same point
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E.
the temperature at the end of the application of the machine divided by the initial temperature
Correct Answer: Option C
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