Electrical Machines
Armature of DC machine is made of

 silicon steel.
 conducting material.
 non-ferrous material.
 insulating material.

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Electrical Machines
In an alternator, voltage drops occurs in

  armature resistance only.
  armature resistance, leakage reactance and armature reaction.
  armature resistance, leakage reactance, armature reaction and earth connection.
  armature resistance and leakage reactance.

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Electrical Machines
The armature mmf of a DC machine has

 stepped distribution and rotates at the speed of armature.
  triangular space distribution and rotates at the speed of armature.
  triangular space distribution and is stationary in space.
  trapezoidal space distribution and is stationary in space.

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