Transformers In case of 3-phase induction motors, plugging means locking of rotor due to harmonics interchanging two supply phases for quick stopping starting the motor on load which is more than the rated load pulling the motor directly on line without a starter locking of rotor due to harmonics interchanging two supply phases for quick stopping starting the motor on load which is more than the rated load pulling the motor directly on line without a starter 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 880 V 88 V 8.8 V 8,800 V 880 V 88 V 8.8 V ANSWER DOWNLOAD EXAMIANS APP
Transformers The noise resulting from vibrations of laminations set by magnetic forces, is termed as Hum Magnetostriction Zoom Boo Hum Magnetostriction Zoom Boo ANSWER DOWNLOAD EXAMIANS APP
Transformers A transformer operates poorly at very low frequencies because _____ Permeability of core is increased None of the listed here Magnetising current is abnormally high Primary reactance is too much increased Permeability of core is increased None of the listed here Magnetising current is abnormally high Primary reactance is too much increased ANSWER DOWNLOAD EXAMIANS APP
Transformers A transformer is an efficient device because it _______ Uses electric coupling Uses capacitive coupling Is a static device Uses inductive coupling Uses electric coupling Uses capacitive coupling Is a static device Uses inductive coupling ANSWER DOWNLOAD EXAMIANS APP
Transformers The dielectric strength of transformer oil is expected to be 100 kV 33 kV lkV 330 kV 100 kV 33 kV lkV 330 kV ANSWER DOWNLOAD EXAMIANS APP
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