Machine-translated by Google. Questions are authored in English.
Top

Discussion

The commutator of a dc generator serves to

  • A.rectify the alternating conductor emf into a direct output
  • B.provide the field excitation the machine requires
  • C.reduce the speed at which the armature must be driven
  • D.limit the current the armature is able to deliver

Answer: A

Each conductor's emf reverses as it passes from one pole to the next, and the commutator reverses the external connection at the same instant so the terminal polarity stays fixed. It is the defining component of the dc machine.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.