Electrical Machines A 220 V dc machine has an armature resistance of 1Ω.If the full-load current is 20 A, the differenc in the induced voltages when the machine is running as a motor and as a generator is zero 20 V 40 V 50 V zero 20 V 40 V 50 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two windings provided on the stator of 1-phase induction motor, one main winding and the other auxiliary winding are connected through inductive coupling in series either of these depending on the design of the motor in parallel through inductive coupling in series either of these depending on the design of the motor in parallel ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3- phase synchronous motor can operate over a wide range of power factors i.e. from lagging to leading power factor. This is achieved by varying the applied voltage. varying the speed. changing the load. changing the field excitation. varying the applied voltage. varying the speed. changing the load. changing the field excitation. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Hunting phenomenon is observed in which motor? Synchronous motor. Induction motor. Both A and C. DC motor. Synchronous motor. Induction motor. Both A and C. DC motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The power developed by salient pole synchronous machine is/are power due to saliency or reluctance only None of these both 1 and 2 excitation power only power due to saliency or reluctance only None of these both 1 and 2 excitation power only ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The speed of a cumulatively compound DC motor can be controlled by varying Shunt field resistance control. Armature resistance control. Any of above. Armature voltage control. Shunt field resistance control. Armature resistance control. Any of above. Armature voltage control. ANSWER DOWNLOAD EXAMIANS APP
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