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  1. It can rotate in one direction only
  2. It is self-starting
  3. It requires only one winding
  4. It is not self-starting
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1 Answers

Option 4 : It is not self-starting

Single-phase induction motor:

  • The single-phase induction motor is non-self-starting in nature.
  • When single-phase AC supply is given to the stator winding of a single-phase motor, it produces alternating flux i.e. which alternates along one space axis only.
  • It is not synchronously revolving (or rotating) flux, thus it cannot produce any rotation. Hence single phase induction motor is not self-starting.
  • To overcome this problem and to make the motor self-starting, it is temporarily converted into a two-phase motor during starting.
  • For this purpose, the stator of a single-phase motor is provided with extra winding known as starting winding in addition to the main winding. These two windings are placed across the single-phase supply.
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