For a constant supply voltage, what are the effects of inserting a series resistance in the field circuit of a dc shunt motor, on its speed and torque?
A. Speed will decrease and the torque will decrease.
B. Speed will increase and the torque will increase.
C. Speed will increase and the torque will decrease.
D. Speed will decrease and the torque will increase.
Answer:C
For a constant supply voltage, what are the effects of inserting a series resistance in the field circuit of a dc shunt motor, on its speed and torque?
A. Speed will decrease and the torque will decrease. B. Speed will increase and the torque will increase. C. Speed will increase and the torque will decrease. D. Speed will decrease and the torque will increase.