Q.

The speed of a cumulative compound dc motor can be controlled by varying 

  • AArmature voltage 
  • BArmature resistance 
  • CShunt field resistance 
  • DAny of the above 
Correct Answer : (D)

Any of the above 

Hints :

The speed of a cumulative compound dc motor can be controlled by varying Armature voltage, Armature resistance and Shunt field resistance.

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