Speed of a permanent magnet DC motor:
A. It is directly proportional to the armature voltage at a given load torque
B. The speed torque characteristics are more flat than in a wound field motor
C. It depends upon armature voltage and are more flat than in a wound field motor
D. None of the mentioned
Answer:C
Speed of a permanent magnet DC motor:
A. It is directly proportional to the armature voltage at a given load torque B. The speed torque characteristics are more flat than in a wound field motor C. It depends upon armature voltage and are more flat than in a wound field motor D. None of the mentioned
Explanation: Speed of a permanent magnet DC motor is directly proportional to the armature voltage at a given load torque and speed torque characteristics are more flat than in a wound field motor as the effect of armature reaction is less pronounced in a PM motor.