Transformers A transformer operates poorly at very low frequencies because _____ Primary reactance is too much increased None of the listed here Permeability of core is increased Magnetising current is abnormally high Primary reactance is too much increased None of the listed here Permeability of core is increased Magnetising current is abnormally high ANSWER DOWNLOAD EXAMIANS APP
Transformers Efficiency of a power transformer is of the order of 50 per cent 25 per cent 100 per cent 98 per cent 50 per cent 25 per cent 100 per cent 98 per cent ANSWER DOWNLOAD EXAMIANS APP
Transformers A transformer is an efficient device because it _______ Uses capacitive coupling Uses inductive coupling Is a static device Uses electric coupling Uses capacitive coupling Uses inductive coupling Is a static device Uses electric coupling ANSWER DOWNLOAD EXAMIANS APP
Transformers When load on a transformer is increased, the eddy current _____ Is increased None of the listed here Remains unchanged Is decreased Is increased None of the listed here Remains unchanged Is decreased ANSWER DOWNLOAD EXAMIANS APP
Transformers The path of the magnetic flux in transformer should have low resistance high resistance low reactance high reluctance low resistance high resistance low reactance high reluctance ANSWER DOWNLOAD EXAMIANS APP
Transformers When load on a transformer is decreased, ______loss is decreased Eddy current Copper Friction Hysteresis Eddy current Copper Friction Hysteresis ANSWER DOWNLOAD EXAMIANS APP
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