Electrical Machines In a synchronous motor electromagnetic power varies directly as applied voltage inversely as applied voltage None of these directly as square of applied voltage directly as applied voltage inversely as applied voltage None of these directly as square of applied voltage ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An alternator is feeding an infinite busbar. Its prime mover is suddenly shutdown. The alternator will come to stand still. continue to work as synchronous motor with same direction of rotation. start working as induction motor. continue to work as alternator but the direction of rotation will reverse. come to stand still. continue to work as synchronous motor with same direction of rotation. start working as induction motor. continue to work as alternator but the direction of rotation will reverse. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When a DC cummulative compound wound motor is loaded Torque and speed both increase. Torque decrease and speed increases. Both torque and speed decrease. Torque increase and speed decrease. Torque and speed both increase. Torque decrease and speed increases. Both torque and speed decrease. Torque increase and speed decrease. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines On which of the following factor/factors the speed of a DC motor depends upon? Armature current. All of these. Applied voltage. Field flux. Armature current. All of these. Applied voltage. Field flux. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a three phase star - delta transformer, what is the angle difference between primary and secondary phase voltages? Star side leads by 30°. Delta side lags by -30°. Delta side leads by 30°. Star side lags by -30°. Star side leads by 30°. Delta side lags by -30°. Delta side leads by 30°. Star side lags by -30°. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the load current and the flux of a DC motor are held constant and voltage applied across its armature is increased by 5%, the speed of the motor will increase by 5 %. depend on other factors. reduce by 5 %. remain unchanged. increase by 5 %. depend on other factors. reduce by 5 %. remain unchanged. ANSWER DOWNLOAD EXAMIANS APP
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