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: b
Explanation: The split phase starting makes use of the starting windings along with the
running windings. The running winding displaces the starting windings by 900.
The displacement between the running and the starting (auxiliary) windings in a single-phase induction motor is typically 90 electrical degrees. This phase displacement allows the motor to generate a rotating magnetic field, which is necessary for starting and running the motor. By having the windings displaced by 90 degrees, the motor can produce a more balanced torque, aiding in its starting and improving its efficiency during operation. The starting winding is often engaged with the help of a centrifugal switch or an electronic controller and is disconnected once the motor reaches a certain speed.