Which type of single-phase motor is known as a ‘resistance-start' motor? 

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SSC JE Electrical 4 Dec 2023 Official Paper II
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  1. Shaded-pole motor 
  2. Universal motor 
  3. Split-phase motor 
  4. Permanent-split capacitor motor  

Answer (Detailed Solution Below)

Option 3 : Split-phase motor 
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Explanation:

  • A resistance-start motor is a type of single-phase motor, and the split-phase motor is specifically known as a resistance-start motor.
  • In split-phase motors, a starting winding with a higher resistance is connected in series with a centrifugal switch.
  • This arrangement provides the necessary phase shift for starting the motor and then disconnects the starting winding once the motor reaches a certain speed, ensuring efficient operation.
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