Electrical Machines
On which of the following factor/factors the speed of a DC motor depends upon?

 Field flux.
 All of these.
 Armature current.
 Applied voltage.

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Electrical Machines
An ideal synchronous motor has no starting torque because

 relative velocity between the stator and rotor mmf’s is zero.
 rotor is made up of salient poles.
  relative velocity between stator and rotor mmf’s is not zero.
 rotor winding is highly reactive.

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