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A series generator, having external characteristics which is a straight line through 0 to 50 V at 200 A is connected as a booster, between a station bus-bar and feeders of 0.5 ohm resistors. The voltage at the far end of feeder at current of 50 A is?(a) 25 V(b) 17 V(c) 8 V(d) 50 VThe question was asked in a national level competition.The doubt is from Methods of Excitation in portion DC Machines of Electrical Machines

Answer» RIGHT answer is (a) 25 V

Explanation: V = VOLTAGE drop-voltage added up by BOOSTERS

= (0.3*50 – 50*50/200)

= 15-12.50

= 2.5 V.


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