Transformers The mutual flux in a transformer remains constant at all loads because ______ Applied voltage and frequency are constant Leakage flux is small Iron core is used Losses are small Applied voltage and frequency are constant Leakage flux is small Iron core is used Losses are small ANSWER DOWNLOAD EXAMIANS APP
Transformers A transformer is an efficient device because Uses capacitive coupling Uses electric coupling A static device Uses inductive coupling Uses capacitive coupling Uses electric coupling A static device Uses inductive coupling ANSWER DOWNLOAD EXAMIANS APP
Transformers The iron core is used to ______of the transformer. None of the listed here Provide tight magnetic coupling Increase the wight Reduce core loss None of the listed here Provide tight magnetic coupling Increase the wight Reduce core loss ANSWER DOWNLOAD EXAMIANS APP
Transformers A common method of cooling a power transformer is air blast cooling natural air cooling Any of these oil cooling air blast cooling natural air cooling Any of these oil cooling 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? 18 V 20 V 2 V 180 V 18 V 20 V 2 V 180 V 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 more than 15 A 15 A less than 15 A None of these more than 15 A 15 A less than 15 A ANSWER DOWNLOAD EXAMIANS APP
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