Electrical Machines Find the reactance voltage when current is changed from -2A to 2A in 4 sec and self inductance is 1H? 2 V 1 V 0 V 4 V 2 V 1 V 0 V 4 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 500 V, 120 KW, 50 Hz, star connected synchronous motor operating at 0.8 power factor leading has full load efficiency of 91%. The armature resistance is equal to 0.08Ω. The magnitude of armature current is nearly equal to 190 A. 127 A. 173 A. 240 A. 190 A. 127 A. 173 A. 240 A. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature reaction in dc motor results decrease in speed. open circuit. increase in speed. short circuit. decrease in speed. open circuit. increase in speed. short circuit. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Dynamic braking is very effective for shunt motors. separately excited motors. series motors. differential compound motors. shunt motors. separately excited motors. series motors. differential compound motors. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A dc shunt motor runs at a no-load speed of 1140 rpm. At full load, armature reaction weakens the main flux by 5% whereas the armature circuit voltage drops by 10%. The motor full-load speed in rpm is 1080 1000 1203 1200 1080 1000 1203 1200 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Dynamic braking is employed to brake both 1 and 2 non reversing drive None of these reversing drive both 1 and 2 non reversing drive None of these reversing drive ANSWER DOWNLOAD EXAMIANS APP
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