A DC servomotor is used to actuate one of the axes of an x-y positioned. The motor has a torque constant of 8.75 in-lb/A and a voltage constant of 10 V/(1000 rev/min). The armature resistance is 2.0 ohms. At a given moment, the positioned table is not moving and a voltage of 20 V is applied to the motor terminals. Determine the torque
(a) Immediately after the voltage is applied and
(b) At a rotational speed of 400 rev/min.
(c) What is the maximum theoretical speed of the motor?