The primary and secondary powers of a transformer are 200W and 100 W respectively, the efficiency of a transformer is:
Correct answer: A. 50%
- A. 50%
- B. 1
- C. 20%
- D. 10%
Explanation
The formula for the efficiency of a transformer is given by, Efficiency η = Output power / input power X 100 = output power / output power + losses X 100 . Primary power is the input power, and secondary is the output power Efficiency η = 100W/200W X 100 Efficiency η = ½ x 100Efficiency η = "50%"
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