Electrical Machines When maximum starting torque is obtained, rotor power is ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The compensating winding in a DC machine is located in armature slots for compensation of the armature reaction. is located on commutating poles for improving commutation. is located on pole shoes to avoid the sparking at the brushes. is located on pole shoes for avoiding the flashover at the commutator. is located in armature slots for compensation of the armature reaction. is located on commutating poles for improving commutation. is located on pole shoes to avoid the sparking at the brushes. is located on pole shoes for avoiding the flashover at the commutator. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Brushes are always placed on--------------- , in order to achieve sparkles commutation? either GNA or MNA None of these GNA MNA either GNA or MNA None of these GNA MNA ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A separately excited DC motor has an armature resistance of 0.5 Ohm. The supply voltage is 250V. Armature current is 20A and the speed of rotation is 1500 rpm. Find the torque developed? 15.28 Nm Zero 15.6 Nm 16.55 Nm 15.28 Nm Zero 15.6 Nm 16.55 Nm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the mechanical angle α between the stator and rotor poles increases, then the stator current Decreases. Increases. None of above. Remains unchanged. Decreases. Increases. None of above. Remains unchanged. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In speed control of DC Series motor, speed lower than the rated speed can be obtained by Connecting an additional resistance in stator circuit. Any of the above. Connecting an additional resistance in the field circuit. Connecting an additional resistance in the armature circuit. Connecting an additional resistance in stator circuit. Any of the above. Connecting an additional resistance in the field circuit. Connecting an additional resistance in the armature circuit. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS