Transformers Which of the following is the main advantage of an auto-transformer over a two winding transformer? Copper losses are negligible Saving in winding material Hysteresis losses are reduced Eddy losses are totally eliminated Copper losses are negligible Saving in winding material Hysteresis losses are reduced Eddy losses are totally eliminated ANSWER DOWNLOAD EXAMIANS APP
Transformers The maximum efficiency of a distribution transformer is at full load at no load at 50% full load at 80% full load at full load at no load at 50% full load at 80% full load ANSWER DOWNLOAD EXAMIANS APP
Transformers The core type transformer provides _______ Much longer magnetic path None of the listed here Shorter magnetic path Lesser average length per turn Much longer magnetic path None of the listed here Shorter magnetic path Lesser average length per turn ANSWER DOWNLOAD EXAMIANS APP
Transformers The mutual flux in a transformer remains constant at all loads because ______ Iron core is used Applied voltage and frequency are constant Losses are small Leakage flux is small Iron core is used Applied voltage and frequency are constant Losses are small Leakage flux is small ANSWER DOWNLOAD EXAMIANS APP
Transformers If 25 W of power are applied to the primary of an ideal transformer with a turns ratio of 10, the power delivered to the secondary load is 2.5 W 0 W 25 W 250 W 2.5 W 0 W 25 W 250 W ANSWER DOWNLOAD EXAMIANS APP
Transformers Which of the following 3 phase connections of transformer create disturbances in communication systems Star/Star Delta/Delta Delta/Star Star/Delta Star/Star Delta/Delta Delta/Star Star/Delta ANSWER DOWNLOAD EXAMIANS APP
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