When testing the windings of a single-phase induction motor, the resin of the start winding will be _____.

In a single-phase induction motor, the resistance of the start winding is typically three to four times greater than that of the run winding. This characteristic is due to the design and functionality of the motor.

The start winding is generally made with more turns of thinner wire to create a higher resistance, which assists in creating the necessary magnetic field to start the motor. When the motor begins to run and reaches a certain speed, the start winding is taken out of the circuit, allowing the run winding, which is designed for more efficient operation while the motor is running, to take over.

The higher resistance in the start winding helps to ensure that a proper phase shift occurs between the windings, which is crucial for starting the motor. Once the motor reaches operational speed, the auxiliary circuit (typically a capacitor or a relay system) disconnects the start winding to avoid overheating due to the higher resistance and lower efficiency compared to the run winding.

This design principle is foundational in single-phase induction motor construction and illustrates how different windings serve distinct purposes in motor operation.