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 Eddy losses are totally eliminated Hysteresis losses are reduced Copper losses are negligible Saving in winding material Eddy losses are totally eliminated Hysteresis losses are reduced ANSWER DOWNLOAD EXAMIANS APP
Transformers Sumpner's test is conducted on transformers to determine all-day efficiency stray losses None of these temperature all-day efficiency stray losses None of these temperature ANSWER DOWNLOAD EXAMIANS APP
Transformers The no load primary current is about ______of full load primary current. Above 40% 30-40% 3-5% 15-30% Above 40% 30-40% 3-5% 15-30% ANSWER DOWNLOAD EXAMIANS APP
Transformers In a step-down transformer, there is a change of 15 A in the load current. This results in change of supply current of None of these 15 A more than 15 A less than 15 A None of these 15 A more than 15 A less than 15 A ANSWER DOWNLOAD EXAMIANS APP
Transformers When the turns ratio of a transformer is 20 and the primary ac voltage is 12 V, the secondary voltage is 12 V 120 V 2,400 V 240 V 12 V 120 V 2,400 V 240 V ANSWER DOWNLOAD EXAMIANS APP
Transformers The noise produced by a transformer is termed as ringing hum zoom buzz ringing hum zoom buzz ANSWER DOWNLOAD EXAMIANS APP
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