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A capacitor start motor gives a larger starting torque than a split-phase motor because

  • A.the capacitor brings the two currents closer to ninety degrees apart
  • B.the capacitor increases the flux the main winding produces
  • C.the capacitor greatly reduces the resistance of the auxiliary winding circuit
  • D.the capacitor allows the machine to start on two phases

Answer: A

A phase displacement approaching quadrature makes the field much more nearly circular, and the starting torque rises accordingly to perhaps three times full-load value. The capacitor is switched out with the auxiliary winding.

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