Electrical Machines Armature resistance control method is used for the _______ ? below rated speed above rated speed both 1 and 2 None of these below rated speed above rated speed both 1 and 2 None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 220 ,V 15 , kW 100 rpm shunt motor with armature resistance of 0.25 , W has a rated line current of 68 A and a rated field current of 2.2 A. The change in field flux required to obtain a speed of 1600 rpm while drawing a line current of 52.8 A and a field current of 1.8 A is 36.36% increase 18.18% increase 36.36% increase 36.36% decrease 36.36% increase 18.18% increase 36.36% increase 36.36% decrease ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Ideal value of voltage regulation of a device is? 0 ∞ a finite negative value a positive finite value 0 ∞ a finite negative value a positive finite value ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The current drawn by a 220 V DC series motor of armature resistance 0.5Ω and back back emf 200 V is 440 A. 40 A. 400 A. 44 A. 440 A. 40 A. 400 A. 44 A. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A short-shunt cumulatively-compounded dc generator builds up a voltage of 220 V at no load at rated speed. If it is operated as a differentially compounded generator, other things remaining the same, it would build up somewhat less than 220 V 220 V 6 V more than 220 V somewhat less than 220 V 220 V 6 V more than 220 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which slots are used in the rotor of an induction motor? None of above. Semi closed slots. Closed slots. Open slots. None of above. Semi closed slots. Closed slots. Open slots. ANSWER DOWNLOAD EXAMIANS APP
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