Electrical Machines
Which of the following bearings and their uses are correct

 ball bearings → small machines
 roller bearings → large machines
 both A and B
 neither 1 nor 2

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Electrical Machines
In a stepper motor the detente torque means

  maximum of the static torque with the phase winding unexcited.
  minimum of the static torque with the phase winding excited.
  minimum of the static torque with the phase winding unexcited.
  maximum of the static torque with the phase winding excited.

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