Transformers In case of 3-phase induction motors, plugging means interchanging two supply phases for quick stopping pulling the motor directly on line without a starter starting the motor on load which is more than the rated load locking of rotor due to harmonics interchanging two supply phases for quick stopping pulling the motor directly on line without a starter starting the motor on load which is more than the rated load locking of rotor due to harmonics ANSWER DOWNLOAD EXAMIANS APP
Transformers When the turns ratio of a transformer is 20 and the primary ac voltage is 12 V, the secondary voltage is 12 V 2,400 V 120 V 240 V 12 V 2,400 V 120 V 240 V ANSWER DOWNLOAD EXAMIANS APP
Transformers When secondary of a current transformer is open-circuited its iron core will be none of above will happen hot because of heavy iron losses taking place in it due to high flux density hot because primary will carry heavy current cool as there is no secondary current none of above will happen hot because of heavy iron losses taking place in it due to high flux density hot because primary will carry heavy current cool as there is no secondary current ANSWER DOWNLOAD EXAMIANS APP
Transformers The power transformer is a constant Power device Main flux device Current device Voltage device Power device Main flux device Current device Voltage device ANSWER DOWNLOAD EXAMIANS APP
Transformers Harmonics in transformer result in magnetic interference with communication circuits All of the listed here increased I2R losses increased core losses magnetic interference with communication circuits All of the listed here increased I2R losses increased core losses ANSWER DOWNLOAD EXAMIANS APP
Transformers No-load on a transformer is carried out to determine efficiency of the transformer magnetising current and loss magnetising current copper loss efficiency of the transformer magnetising current and loss magnetising current copper loss ANSWER DOWNLOAD EXAMIANS APP
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