Transformer Efficiency Calculation (Jee Mains) | ExamDuo
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AC Devices
Medium
Transformer Efficiency Calculation
A transformer is used to light 140 watt 24 volt lamp from 240 volt ac mains, the current in the main cable is 0.7 amp. The efficiency of the transformer is
SELECT ONE OPTION
A
63.8%
B
74 %
C
83.3 %
D
48 %
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