In a transformer routine efficiency depends upon_____________?
Correct answer: D. both B. and (c)
- A. supply frequency
- B. load current
- C. power factor of load
- D. both B. and (c)
Explanation
Routine, or all-day, efficiency depends on the load current and the load power factor because output energy and copper losses vary with these quantities. It is not determined directly by supply frequency, so both B and C are required.
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