1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Back emf in a single loop of wire?

  1. Apr 13, 2015 #1
    I have been thinking about coils of wire carrying alternatingcurrent. From what I understand, a back emf is induced in the coil because there is a changing magnetic field around each individual loop of wire, and therefore there is a changing flux through each loop because the changing field around all of the other loops passes through this loop. But what about a single loop of wire? Surely a back emf would not be induced, because this would require the loop to be affected by its own generated magnetic field... Or is this in fact the case?

    Thank you in advance!
     
    Last edited: Apr 13, 2015
  2. jcsd
  3. Apr 13, 2015 #2
    Yes, the loop is affected by its own magnetic field. This effect is measured by the inductance of the loop and result in a "reactance" of the loop, a quantity with the same units as resistance.
    http://en.wikipedia.org/wiki/Electrical_reactance
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Back emf in a single loop of wire?
  1. Emf in a wire? (Replies: 3)

  2. Back EMF (Replies: 2)

  3. Back emf, transformer (Replies: 16)

  4. Back EMF and Inductors (Replies: 10)

Loading...