Transformers
In case of 3-phase induction motors, plugging means

interchanging two supply phases for quick stopping
starting the motor on load which is more than the rated load
locking of rotor due to harmonics
pulling the motor directly on line without a starter

ANSWER DOWNLOAD EXAMIANS APP

Transformers
An ideal transformer is one which has

no losses and magnetic leakage
core of stainless steel and winding of pure copper metal
interleaved primary and secondary windings
a common core for its primary and secondary windings

ANSWER DOWNLOAD EXAMIANS APP

Transformers
No-load current of a transformer has

has high magnitude and low power factor
has small magnitude and low power factor
has high magnitude and high power factor
has small magnitude and high power factor

ANSWER DOWNLOAD EXAMIANS APP