Transformer efficiency calculation (Jee Mains) | ExamDuo
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AC Devices
Medium
Transformer efficiency calculation
A transformer is used to light a 100 W and 110 V lamp from a 220 V mains. If the main current is 0.5 amp, the effeciency of the transformer is approximately
SELECT ONE OPTION
A
50%
B
90%
C
10%
D
30%
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