Transformers What is the approximate efficiency of large transformers? 85% 75% 95 % 65% 85% 75% 95 % 65% ANSWER DOWNLOAD EXAMIANS APP
Transformers If a transformer core has air gaps, then, _________ Magnetising current is greatly increased Reluctance of magnetic path is decreased Eddy current is increased Hysteresis loss is decreased Magnetising current is greatly increased Reluctance of magnetic path is decreased Eddy current is increased Hysteresis loss is decreased ANSWER DOWNLOAD EXAMIANS APP
Transformers Which winding in a transformer has more number of turns? Low voltage winding Primary winding Secondary winding High voltage winding Low voltage winding Primary winding Secondary winding High voltage winding ANSWER DOWNLOAD EXAMIANS APP
Transformers A transformer is an efficient device because A static device Uses inductive coupling Uses electric coupling Uses capacitive coupling A static device Uses inductive coupling Uses electric coupling Uses capacitive coupling ANSWER DOWNLOAD EXAMIANS APP
Transformers Which of the following transformer should never have the secondary open circuited while the primary is energised? Auto transformer Potential transformer Current transformer Power transformer Auto transformer Potential transformer Current transformer Power transformer ANSWER DOWNLOAD EXAMIANS APP
Transformers Auto-transformer makes effective saving on copper and copper losses, when its transformation ratio is great than one less than one approximately equal to one None of these great than one less than one approximately equal to one None of these ANSWER DOWNLOAD EXAMIANS APP
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