Electrical Machines Hunting phenomenon is observed in which motor? Synchronous motor. Both A and C. Induction motor. DC motor. Synchronous motor. Both A and C. Induction motor. DC motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The sequence of induction motor is RYB, then the direction of induction motor can be changed by which of the following sequence? BRY All of these BYR RBY BRY All of these BYR RBY ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a loaded DC motor, if the brushes are given a shift from the interpolar axis in the direction of rotation, then the commutation will deteriorate and the speed falls. improve and the speed rises. improve and the speed falls. deteriorate and the speed rises. deteriorate and the speed falls. improve and the speed rises. improve and the speed falls. deteriorate and the speed rises. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider a separately excited DC motor. If the field current is increased while the armature terminal voltage is held constant, then speed of the motor will Decrease.d remains same. increase. none of these. Decrease.d remains same. increase. none of these. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Field weakening method is also called as-----------? constant torque control constant voltage control constant current control constant power control constant torque control constant voltage control constant current control constant power control ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is power factor of a 3 - φ induction motor at no load? Same as full load. High. Equal to 1. Low. Same as full load. High. Equal to 1. Low. ANSWER DOWNLOAD EXAMIANS APP
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