1.

The efficiency of a machine is measured by

A. (Energy Input ⁄ Wasted Energy Output) × 100 %
B. (Wasted Energy Output ⁄ Energy Input) × 100 %
C. (Energy Input ⁄ Useful Energy Output) × 100 %
D. (Useful Energy Output ⁄ Energy Input) × 100 %
Answer» E.


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