Question 380Electricity & Electronics - QMED

The correct answer is B) Motor rotation can be reversed by reversing the leads on the starting winding. In a split-phase induction motor, the starting winding is designed to be out of phase with the main winding. By reversing the leads on the starting winding, the phase relationship between the two windings is changed, which in turn reverses the direction of the rotating magnetic field and hence the direction of motor rotation. This is a simple and effective way to reverse the rotation of a split-phase induction motor. The other options are incorrect because: A) Motor speed cannot be readily adjusted from zero to full speed in a split-phase induction motor, C) The motor cannot run as a generator without significant modifications, and D) Reversing the rotation requires changing the wiring, not just the direction of the current.