Electrical Machines If the applied voltage to a dc machine is 230 V, then the back emf, for maximum power developed, is 115 V 460 V 230 V 200 V 115 V 460 V 230 V 200 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the field winding connection of DC shunt motor is changed It will run in opposite direction. It will run in same direction. motor will become slow. motor will not run. It will run in opposite direction. It will run in same direction. motor will become slow. motor will not run. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines How can the synchronous speed of a 3 - Φ IM be varied? By varying the supply frequency. By varying number of poles. Both (A) and (B). By varying supply voltage. By varying the supply frequency. By varying number of poles. Both (A) and (B). By varying supply voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In most condition which frame of motor will be preferred? Splash proof. Drip proof. Totally enclosed fan coiled. Open type. Splash proof. Drip proof. Totally enclosed fan coiled. Open type. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a transformer, the frequency of a voltage at the secondary is less than primary. greater than the primary. any of the above. equal to primary. less than primary. greater than the primary. any of the above. equal to primary. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two of supply terminals to a 3 - Φ induction motor get interchanged during re-connection after normal maintenance. When switched on the supply, the motor will not start at all. rotate in the same direction as before maintenance. get heated and damaged. rotate in direction opposite to that before maintenance. not start at all. rotate in the same direction as before maintenance. get heated and damaged. rotate in direction opposite to that before maintenance. ANSWER DOWNLOAD EXAMIANS APP
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