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

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

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

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

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