Question 20
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.
Objective
Question details
- Exam body
- WAEC
- Subject
- Physics
- Year
- 2017
- Question no.
- #20
- Type
- Objective
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