A brush-lifting motor uses a radial commutator, and weights are mounted at the front of the armature. When the motor reaches about ____% of full speed, these weights swing outward due to centrifugal force and cause two push rods to act against a spring barrel and short-circuiting necklace.
A) 50
B) 60
C) 75
D) 90

Question

Quizplus · Accepted Answer

The weights swing outward at about 75% of full speed due to centrifugal force.

A Brush-Lifting Motor Uses a Radial Commutator, and Weights Are