Electrical Machines If the applied voltage to a dc machine is 230 V, then the back emf, for maximum power developed, is 460 V 115 V 200 V 230 V 460 V 115 V 200 V 230 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC shunt generator builds up 230 V when driven in clockwise direction. In case it is driven in anti clockwise direction, other things remaining unchanged, then the voltage build up is some what more than 230 V not possible 230 V some what less than 230 V some what more than 230 V not possible 230 V some what less than 230 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In induction motor when the length of the air gap is increased, the magnetizing current of the motor increases while the short circuit current __________________. increased. decreased. remains unchanged. kept constant to certain value. increased. decreased. remains unchanged. kept constant to certain value. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When a transformer is loaded, the secondary terminal voltage drops. That means power factor is zero. leading. lagging. unity. zero. leading. lagging. unity. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Crawling in an induction motor is due to insufficient starting torque. slip ring rotor. time harmonics in supply. space harmonics produced by winding currents. insufficient starting torque. slip ring rotor. time harmonics in supply. space harmonics produced by winding currents. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In which transformer, the tertiary winding is used? Star - delta Delta - star Delta - delta Star - star Star - delta Delta - star Delta - delta Star - star ANSWER DOWNLOAD EXAMIANS APP
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