Electrical Machines
An electric motor with constant output power will have a torque speed characteristics in the form of a

 Straight line through the origin.
 Circle about the origin.
 Straight line parallel to the speed axis.
 Rectangular hyperbola

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Electrical Machines
Skewing of the rotor in a 3 - Φ squirrel cage induction motor reduces

  noise, parasitic and starting torque, but increase pull out torque.
  noise and pullout torque, but increase parasitic and starting torque.
  noise and parasitic torque, but increase starting and pull-out torque.
  noise, parasitic torque, starting torque and pull out torque.

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