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asked Apr 30, 2018 in Electrical Measurements and Instrumentation by Shimroz123
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A transformer operates 24 hours day at full -load. It's full -load efficiency is :  (A) equal all day efficiency (B) more than all -day efficiency (C) less than all -day efficiency (D) equal to maximum efficiency

asked Apr 30, 2018 in Electrical Engineering by Shimroz123
1 answer 42 views

At full -load of a transformer, the iron loss and copper loss are 3000 W and 4000 W respectively. Then total loss at maximum efficiency is :  (A) 7000 W (B) 6000 W (C) 8000 W (D) 4000 W

asked Apr 30, 2018 in Electrical Engineering by Shimroz123
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asked Apr 30, 2018 in Electrical Engineering by Shimroz123
1 answer 15 views

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A 230 V, 50 Hz phase controlled single-phase full-controlled SCR bridge converter draws 15 A constant dc current. If the source inductance is 3 mH, the drop in dc output voltage is (A) 4.5 V (B) 6.75 V (C) 9 V (D) 13.5 V

asked Apr 28, 2018 in Power Electronics by Shimroz123

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