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

Discussion

The core flux of a transformer at rated voltage is

  • A.nearly independent of the load current
  • B.proportional to the load current drawn
  • C.zero when the secondary is open circuited
  • D.greatest when the secondary is short circuited

Answer: A

The applied voltage and the frequency fix the flux through the emf equation, and the load's ampere-turns are balanced by an equal primary contribution. That constancy is why the iron loss of a transformer hardly changes with load.

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

Post your comment

Please log in or register to post a comment.