Electrical Machines
In induction motor when the length of the air gap is increased, the magnetizing current of the motor increases while the short circuit current __________________.

 increased.
 decreased.
 kept constant to certain value.
  remains unchanged.

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Electrical Machines
The 3 - Φ induction motors are, by a very considerable margin, the most widely used AC motors as

  they have maximum efficiency and maximum starting torque.
  they are capable of operation under range of leading and lagging pf.
  they have very good speed regulation.
  these are cheaper in cost, simple and rugged in construction.

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