Question

If voltage of a d.c. servo-motor increases, then the Torque-speed characteristic and slope respectively are

• A. Linear, negative
• B. Linear, positive
• C. Non-Linear, negative
• D. Non-Linear, positive

Hint:

Torque decreases with increasing speed in d.c. motors — hence negative slope.

Answer 1

The Correct Option is A

For a d.c. servo-motor, the torque-speed curve is linear with a negative slope due to back EMF effects.