Electrical Machines
Two of supply terminals to a 3 - Φ induction motor get interchanged during re-connection after normal maintenance. When switched on the supply, the motor will

  get heated and damaged.
  rotate in direction opposite to that before maintenance.
  rotate in the same direction as before maintenance.
  not start at all.

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Electrical Machines
For a given torque, reducing diverter resistance of a DC series motor causes

 decrease in speed demanding less armature current.
 increase in speed demanding more armature current.
 increase in speed but armature currnet remains the same.
 decrease in speed but armature current remains the same.

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Electrical Machines
Which is the arrangement of windings in a core type single phase transformer?

 Half hv inside and half lv outside on each core limb
 Lv on one core limb and hv on the other
 Half lv inside and half hv outside on each core limb
 Sandwiched lv and hv discs on each core limb

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