Transformers Cores of large transformers are built upto nearly circular cross section in order to reduce Leakage reactance Eddy current loss Iron losses Copper loss Leakage reactance Eddy current loss Iron losses Copper loss ANSWER DOWNLOAD EXAMIANS APP
Transformers A certain transformer has 400 turns in the primary winding and 2,000 turns in the secondary winding. The turns ratio is 5 25 0.4 0.2 5 25 0.4 0.2 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 The primary winding of a transformer has 110 V ac across it. What is the secondary voltage if the turns ratio is 8? 8,800 V 8.8 V 880 V 88 V 8,800 V 8.8 V 880 V 88 V ANSWER DOWNLOAD EXAMIANS APP
Transformers Distribution transformers are generally designed for maximum efficiency around 90% load Zero load 50% load 25% load 90% load Zero load 50% load 25% load ANSWER DOWNLOAD EXAMIANS APP
Transformers A transformer operates poorly at very low frequencies because _____ Primary reactance is too much increased Magnetising current is abnormally high Permeability of core is increased None of the listed here Primary reactance is too much increased Magnetising current is abnormally high Permeability of core is increased None of the listed here ANSWER DOWNLOAD EXAMIANS APP
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