Electrical Machines If the mechanical angle α between the stator and rotor poles increases, then the stator current Decreases. None of above. Remains unchanged. Increases. Decreases. None of above. Remains unchanged. Increases. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The current drawn by the armature of DC motor is directly proportional to The voltage across the terminals. The speed of motor. None of above. The torque required. The voltage across the terminals. The speed of motor. None of above. The torque required. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The wound rotor type IM is used for____________ speed operation. maximum. constant. minimum. variable. maximum. constant. minimum. variable. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3 - Φ, 4 pole, 50 Hz induction motor 4 % slip, calculate frequency of the rotor emf? 50 Hz. 2 Hz. 3 Hz. 10 Hz. 50 Hz. 2 Hz. 3 Hz. 10 Hz. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The maximum possible speed at which an alternator can be driven to generate 50 Hz and 4000 V is 3600 rpm. 3000 rpm. 1500 rpm. 4000 rpm. 3600 rpm. 3000 rpm. 1500 rpm. 4000 rpm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In dc machines, the field system has to be provided on stator unlike synchronous machines Where in it could be on any member, because it reduces field structure iron losses commutator action is not possible otherwise it gives more uniform air-gap flux distribution dc machines are comparatively low rating machines. it reduces field structure iron losses commutator action is not possible otherwise it gives more uniform air-gap flux distribution dc machines are comparatively low rating machines. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS