If the voltage applied across the armature of a dc motor is reduced by 5%, keeping the load current and field current unchanged, the speed of the motor will
A. increase by about 5%.
B. reduce by about 5%.
C. remain unaltered.
D. unpredictable.
Answer:B
If the voltage applied across the armature of a dc motor is reduced by 5%, keeping the load current and field current unchanged, the speed of the motor will
A. increase by about 5%. B. reduce by about 5%. C. remain unaltered. D. unpredictable.