Question Pool -- Category E5I

What is an optical shaft encoder?
A.
An array of neon or LED indicators whose light transmission path is controlled by a rotating wheel
B.
An array of optocouplers whose light transmission path is controlled by a rotating wheel
C.
An array of neon or LED indicators mounted on a rotating wheel in a coded pattern
D.
An array of optocouplers mounted on a rotating wheel in a coded pattern

See answer.
Try another question.
Choose another category.