Transformers A transformer is an efficient device because it _______ Uses capacitive coupling Uses electric coupling Uses inductive coupling Is a static device Uses capacitive coupling Uses electric coupling Uses inductive coupling Is a static device 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 less than 15 A 15 A None of these more than 15 A less than 15 A 15 A None of these more than 15 A ANSWER DOWNLOAD EXAMIANS APP
Transformers Which of the following transformer should never have the secondary open circuited while the primary is energised? Current transformer Power transformer Potential transformer Auto transformer Current transformer Power transformer Potential transformer Auto transformer ANSWER DOWNLOAD EXAMIANS APP
Transformers The primary coil of a transformer is connected to a 60 V ac source. The secondary coil is connected to a 330 load. The turns ratio is 3:1. What is the secondary voltage? 20 V 18 V 2 V 180 V 20 V 18 V 2 V 180 V ANSWER DOWNLOAD EXAMIANS APP
Transformers The short circuit test helps us to find Iron loss at no load None of the listed here Cu loss at any desire load Cu loss at no load Iron loss at no load None of the listed here Cu loss at any desire load Cu loss at no load ANSWER DOWNLOAD EXAMIANS APP
Transformers The open circuit test on a transformer is always made on ______ High voltage winding Either low or high voltage winding None of the listed here Low voltage winding High voltage winding Either low or high voltage winding None of the listed here Low voltage winding ANSWER DOWNLOAD EXAMIANS APP
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