Transformers A transformer is an efficient device because it _______ Uses capacitive coupling Uses electric coupling Is a static device Uses inductive coupling Uses capacitive coupling Uses electric coupling Is a static device Uses inductive coupling ANSWER DOWNLOAD EXAMIANS APP
Transformers In a transformer, leakage flux Helps in transfer of energy Is minimised by interleaving the primary and secondary windings Is negligible at full load Produces mutually induced emf Helps in transfer of energy Is minimised by interleaving the primary and secondary windings Is negligible at full load Produces mutually induced emf ANSWER DOWNLOAD EXAMIANS APP
Transformers Leakage flux in a transformer occurs because Iron core has high permeability Air is not a good magnetic insulator Applied voltage is sinusoidal Transformer is not an efficient device Iron core has high permeability Air is not a good magnetic insulator Applied voltage is sinusoidal Transformer is not an efficient device 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 240 V 2,400 V 120 V 12 V 240 V 2,400 V 120 V 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
Transformers Primary winding of a transformer is always a low voltage winding is always a high voltage winding None of these could either be a low voltage or high voltage winding is always a low voltage winding is always a high voltage winding None of these could either be a low voltage or high voltage winding ANSWER DOWNLOAD EXAMIANS APP
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