In a given transformer for given applied voltage, losses which remain constant irrespective of load changes are______________?
Correct answer: C. hysteresis and eddy current losses
- A. friction and windage losses
- B. copper losses
- C. hysteresis and eddy current losses
- D. none of the above
Explanation
With applied voltage and frequency fixed, hysteresis and eddy-current losses depend mainly on the core flux and frequency, so they remain nearly constant as load changes. Copper loss varies with the square of load current.
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