Electrical Machines
The armature of DC machine is made of silicon steel lamination to

 increase the permeability.
 reduce hysteresis loss only.
 reduce eddy current loss only.
 reduce both eddy current and hysteresis loss.

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Electrical Machines
When the supply terminal of a DC shunt motor are interchanged

  The motor will run at its normal speed in the same direction as before.
 The direction of rotation will reverse.
 The motor will stop.
 The motor will run much faster in the same direction.

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