Transformers The hum in a transformer is mainly attributed to mechanical vibrations load changes magnetostriction oil in the transformer mechanical vibrations load changes magnetostriction oil in the transformer ANSWER DOWNLOAD EXAMIANS APP
Transformers The efficiencies of transformers compared with that of electric motors of the same power are somewhat smaller much higher about the same much smaller somewhat smaller much higher about the same much smaller ANSWER DOWNLOAD EXAMIANS APP
Transformers In Ns is the synchronous speed and s the slip, then actual running speed of an induction motor will be (Ns-l)s s.N. Ns (l-s)Ns (Ns-l)s s.N. Ns (l-s)Ns ANSWER DOWNLOAD EXAMIANS APP
Transformers A transformer has 200 W as iron loss at full load. The iron loss at full load. The iron loss at half full load will be 400 W 50 W 100 W 200 W 400 W 50 W 100 W 200 W ANSWER DOWNLOAD EXAMIANS APP
Transformers Leakage flux in a transformer occurs because Iron core has high permeability Applied voltage is sinusoidal Transformer is not an efficient device Air is not a good magnetic insulator Iron core has high permeability Applied voltage is sinusoidal Transformer is not an efficient device Air is not a good magnetic insulator ANSWER DOWNLOAD EXAMIANS APP
Transformers Which motor is preferred for use in mines where explosive gases exist? Shunt motor Induction motor Air motor Synchronous motor Shunt motor Induction motor Air motor Synchronous motor ANSWER DOWNLOAD EXAMIANS APP
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