Electrical Machines To get the speed of DC motor is more than normal without wastage of electrical energy _____________ is used. Rheostatic control. None of above. Ward Leonard control. Any of above method. Rheostatic control. None of above. Ward Leonard control. Any of above method. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Find the synchronous reactance of alternators in which a given field current of 200 A on short circuit and a generated emf of 50 V on open circuit. Armature resistance is 0.1 ohm 0.5Ω. 0.25Ω. 0.23Ω. 1Ω. 0.5Ω. 0.25Ω. 0.23Ω. 1Ω. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Number of slip rings in 3-phase synchronous motor will be 0 3 or 4 1 2 0 3 or 4 1 2 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If any two leads from slip rings are interchanged in a 3 - Φ induction motor, the motor will run in a direction opposite to previous one. continue running in the same direction as before. not run. get damaged. run in a direction opposite to previous one. continue running in the same direction as before. not run. get damaged. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In induction motor the 7th harmonic torque may make the motor rotate at (1 / 7)th synchronous speed. This is called crawling. harmonics. cogging. resonance. crawling. harmonics. cogging. resonance. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two mechanically coupled alternators deliver power at 50 Hz and 60 Hz respectively. Highest speed of alternator is 3600 rpm. 3000 rpm. 600 rpm. 500 rpm. 3600 rpm. 3000 rpm. 600 rpm. 500 rpm. ANSWER DOWNLOAD EXAMIANS APP
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