Transformers If a power transformer is operated at very high frequencies, then ______ Core losses will be excessive None of the listed here Primary reactance is too much increased Primary will draw large power Core losses will be excessive None of the listed here Primary reactance is too much increased Primary will draw large power ANSWER DOWNLOAD EXAMIANS APP
Transformers The effect of leakage flux in a transformer is to ______ None of the listed here Increase copper losses Decreases copper losses Cause voltage drop in the windings None of the listed here Increase copper losses Decreases copper losses Cause voltage drop in the windings ANSWER DOWNLOAD EXAMIANS APP
Transformers The efficiencies of transformers compared with that of electric motors of the same power are about the same much higher much smaller somewhat smaller about the same much higher much smaller somewhat smaller ANSWER DOWNLOAD EXAMIANS APP
Transformers The iron core is used to ______of the transformer. Reduce core loss None of the listed here Increase the wight Provide tight magnetic coupling Reduce core loss None of the listed here Increase the wight Provide tight magnetic coupling ANSWER DOWNLOAD EXAMIANS APP
Transformers The power efficiency of a lightning transformer is always ______its all day efficiency. Less than None of the listed here Higher than Equal to Less than None of the listed here Higher than Equal to ANSWER DOWNLOAD EXAMIANS APP
Transformers Short circuit test on transformers is conducted to determine copper losses core losses eddy current losses hysteresis losses copper losses core losses eddy current losses hysteresis losses ANSWER DOWNLOAD EXAMIANS APP
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