Transformers In case of 3-phase induction motors, plugging means starting the motor on load which is more than the rated load interchanging two supply phases for quick stopping locking of rotor due to harmonics pulling the motor directly on line without a starter starting the motor on load which is more than the rated load interchanging two supply phases for quick stopping locking of rotor due to harmonics pulling the motor directly on line without a starter ANSWER DOWNLOAD EXAMIANS APP
Transformers Cores of large transformers are built upto nearly circular cross section in order to reduce Copper loss Eddy current loss Iron losses Leakage reactance Copper loss Eddy current loss Iron losses Leakage reactance ANSWER DOWNLOAD EXAMIANS APP
Transformers The approximate efficiency of a large transformer is 50% 65% 80% 95% 50% 65% 80% 95% ANSWER DOWNLOAD EXAMIANS APP
Transformers In a certain transformer, the input power to the primary is 120 W. If 8.5 W are lost to the winding resistance, what is the output power to the load, neglecting any other issues? 111.5 W 14.1 W 0 W 1,020 W 111.5 W 14.1 W 0 W 1,020 W ANSWER DOWNLOAD EXAMIANS APP
Transformers A transformer has a 1:6 turns ratio and a secondary coil load resistance of 470 . The load resistance as seen by the source is 1.3 Ω 7.8 Ω 78 Ω 13 Ω 1.3 Ω 7.8 Ω 78 Ω 13 Ω ANSWER DOWNLOAD EXAMIANS APP
Transformers When a 6 V battery is connected across the primary of a transformer with a turns ratio of 8, the secondary voltage is 6 V 0 V 48 V 0.75 V 6 V 0 V 48 V 0.75 V ANSWER DOWNLOAD EXAMIANS APP
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