A motor of a corn mill machine operates on elec... - WAEC Physics 2017 Question
A motor of a corn mill machine operates on electrical energy of \(1.44 \times 10^{5}\)J. If one-quarter of the energy is wasted on sound and heat, determine the efficiency of the machine.
A
25%
B
36%
C
64%
D
75%
correct option: d
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