Transformers The no load primary current is about ______of full load primary current. 30-40% 3-5% Above 40% 15-30% 30-40% 3-5% Above 40% 15-30% ANSWER DOWNLOAD EXAMIANS APP
Transformers The main reason for generation of harmonics in a transformer could be saturation of core mechanical vibrations poor insulation fluctuating load saturation of core mechanical vibrations poor insulation fluctuating load ANSWER DOWNLOAD EXAMIANS APP
Transformers The noise produced by a transformer is termed as hum zoom ringing buzz hum zoom ringing buzz ANSWER DOWNLOAD EXAMIANS APP
Transformers The primary and secondary windings are wound on the top of each other in order to reduce ______ Winding resistance Leakage reactance Copper losses Iron losses Winding resistance Leakage reactance Copper losses Iron losses ANSWER DOWNLOAD EXAMIANS APP
Transformers To step 110 V ac down to 20 V ac, the turns ratio must be 18 5.5 0.18 0.018 18 5.5 0.18 0.018 ANSWER DOWNLOAD EXAMIANS APP
Transformers If a transformer has 50 turns in the primary winding and 10 turns in the secondary winding, what is the reflective resistance if the secondary load resistance is 250 ? 25 Ω 250 Ω 6250 Ω 62500 Ω 25 Ω 250 Ω 6250 Ω 62500 Ω ANSWER DOWNLOAD EXAMIANS APP
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