Electrical Machines
Ward-Leonard control is basically a ___________ control method.

 Field control.
 Armature voltage control.
 Armature resistance control.
 Field diverter control.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
For a given torque, reducing diverter resistance of a DC series motor causes

 increase in speed demanding more armature current.
 decrease in speed but armature current remains the same.
 increase in speed but armature currnet remains the same.
 decrease in speed demanding less armature current.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Consider the following statements regarding the speed control of dc motors : 1. ward-leonard method is suitable forconstant-torque drives 2. Ward-leonard method is suitable for constant-power drives 3. field-control method facilitates speed control below base speed 4. Armature-resistance control method is more efficient than ward-leanard method 5. Field-control method is suitable for constant-torque drives 6. Armature-resistance control method is suitable for constant-torque drives From these, the correct answer is

 1, 4, 6
 1, 2, 5
 1, 2, 6
 1, 3, 5

ANSWER DOWNLOAD EXAMIANS APP