An important difference between a universal and a split-phase motor is that the split-phase motor has a. two brushes attached to the stator. b. a single coil formed on the rotor. c. two windings on the stator. d. an armature with a commutator.

The correct answer is C. The split phase motor has two windings on the stator.

A split phase AC induction motor runs on a single phase and splits the phase into two windings, a run winding, and a start winding, on the stator. The start winding axes is 90 degrees electrically to the run winding. This helps to produce a rotating magnetic field at startup and gets the motor spinning. This secondary 'start' winding on the stator is a key feature of split phase motors.

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In 1973 was when graphical user interfaces (guis) pioneered.