Electrical Machines If the field of a dc shunt motor gets opened while the motor is running, then the armature current will drop armature will oscillate about original speed as the mean speed motor will attain dangerously high speed motor will become slow. armature current will drop armature will oscillate about original speed as the mean speed motor will attain dangerously high speed motor will become slow. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Synchronous condensers are used to improve the power factor All of these improve starting torque reduce hunting improve the power factor All of these improve starting torque reduce hunting ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature reaction in dc motor results increase in speed. short circuit. open circuit. decrease in speed. increase in speed. short circuit. open circuit. decrease in speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Synchronous reactance of an alternator represents field winding reactance a reactance operating at synchronous speed armature reactance and leakage reactance All of these field winding reactance a reactance operating at synchronous speed armature reactance and leakage reactance All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The speed of rotating magnetic field of 8 pole 50 Hz induction motor is 1000 rpm 1500 rpm 3000 rpm 750 rpm 1000 rpm 1500 rpm 3000 rpm 750 rpm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If dimension of all the parts of a synchorous generator and the number of field and armature turns are double, then generated voltage will change by a factor of 1. 2. 4. 8. 1. 2. 4. 8. ANSWER DOWNLOAD EXAMIANS APP
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