A motor of a corn mill machine operates on electrical energy of 1.44×105J. If one-quarter of the energy is wasted on sound and heat, determine the efficiency of the machine.

By: |Published on: Jan 24|Categories: Physics WAEC| 0 comments

A. 25%
B. 36%
C. 64%
D. 75%

Correct Answer: Option D

D. 75%

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