Commutator
/ˌkɑmjəˈteɪtˈɔr/
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Definition
(noun) An electrical switch, in a generator or motor, that periodically reverses the direction of an electric current.
Sentence Examples
The commutator controlled the electric current.
He designed a new commutator system.
CEFR Practice Quiz
The engineer quickly replaced the broken ____ in the electric motor.