Electrical Machines Slip rings of an induction motors are made of carbon. aluminium. phosphor bronze. stainless steel. carbon. aluminium. phosphor bronze. stainless steel. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When excitation is increased (over excitation), the synchronous generator operates at unity power factor. any of the above. leading power factor. lagging power factor. unity power factor. any of the above. leading power factor. lagging power factor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The current drawn by the a 230 V DC motor of armature resistance 0.5 Ω and back emf 200 V is 660 600 40 60 660 600 40 60 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the back emf in DC motor vanishes suddenly the motor will start haunting. run at very high speed. burn. run at very low speed. start haunting. run at very high speed. burn. run at very low speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Damper winding is used to decrease the load current. suppress the hunting. both 1 and 2. increase the load current. decrease the load current. suppress the hunting. both 1 and 2. increase the load current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In an induction motor, the no-load slip is generally equal to 1.5 %. less than 1 %. 4 %. zero. 1.5 %. less than 1 %. 4 %. zero. ANSWER DOWNLOAD EXAMIANS APP
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