Physics · Electrical Machines
A 400 V/100 V, 20 kVA, two-winding transformer is employed as an autotransformer to supply a 400 V circuit from a 500 V source. As a two-winding transformer at rated load with unity power factor, its efficiency is 0.95. What is its percentage efficiency as an autotransformer?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 495%
Correct answer
98.96%
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