Electrical Machines
Armature resistance control method is also called as-----------?

 constant voltage control
 constant current control
 constant torque control
 constant power control

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Electrical Machines
Ward-Leonard system for controlling the speed of a DC motor is used where

 Very fine speed control over the whole range from zero to normal speed is required.
 All of above.
 The accuracy in speed control is required.
 The speed in both the direction is required.

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