Transformers The dielectric strength of transformer oil is expected to be 330 kV 33 kV lkV 100 kV 330 kV 33 kV lkV 100 kV ANSWER DOWNLOAD EXAMIANS APP
Transformers The path of the magnetic flux in transformer should have low reactance high reluctance low resistance high resistance low reactance high reluctance low resistance high resistance ANSWER DOWNLOAD EXAMIANS APP
Transformers The efficiency of a transformer, under heavy loads, is comparatively low because voltage drop both in primary and secondary becomes large iron loss is increased considerably copper loss becomes high in proportion to the output secondary output is much less as compared to primary input voltage drop both in primary and secondary becomes large iron loss is increased considerably copper loss becomes high in proportion to the output secondary output is much less as compared to primary input ANSWER DOWNLOAD EXAMIANS APP
Transformers Which of the following transformer should never have the secondary open circuited while the primary is energised? Auto transformer Power transformer Potential transformer Current transformer Auto transformer Power transformer Potential transformer Current transformer ANSWER DOWNLOAD EXAMIANS APP
Transformers The leakage flux in a transformer depends upon load current load current, voltage and frequency load current, voltage, frequency and power factor load current and voltage load current load current, voltage and frequency load current, voltage, frequency and power factor load current and voltage ANSWER DOWNLOAD EXAMIANS APP
Transformers Auto-transformer makes effective saving on copper and copper losses, when its transformation ratio is approximately equal to one None of these less than one great than one approximately equal to one None of these less than one great than one ANSWER DOWNLOAD EXAMIANS APP
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