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!

Homework Help: KVL, where am I wrong?

  1. Sep 23, 2011 #1
    Here's my work. When I apply KVL around loop 1, I get +5V, but when I apply it around loop 2, I get -5, which is inconsistent with my first results?

    Where am I going wrong, or have I disproved a fundamental law?

  2. jcsd
  3. Sep 23, 2011 #2
    Sorry, my work got cut out. The bottom says: +V+5=0, V=-5
  4. Sep 23, 2011 #3


    User Avatar

    Staff: Mentor

    I only see one loop. And what's the diode and resistor on the left supposed to be indicating?
  5. Sep 23, 2011 #4
    I had redrawn the network on the left and configured it to the form on the right. This is how my textbook deals with KVL.
  6. Sep 23, 2011 #5
    Never mind. I figured it out. I entirely forgot that there is a 10V drop across the diode.
    Last edited: Sep 23, 2011
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook