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: Two electrical Problems I'm stuck on

  1. Feb 8, 2008 #1
    hey guys, I'm not sure how to start these off. Can someone give me a hint?

    I'm not sure how else to show these (they have circuit pictures). The questions are numbers 18 & 24 here http://www.physics.brocku.ca/Courses/2P31/DH-Asst1.pdf [Broken].

    thanks in advance :)
    Last edited by a moderator: May 3, 2017
  2. jcsd
  3. Feb 9, 2008 #2
    For 18... you know that Vth = Rthv * i_sc. If you remove V, find the equivalent resistance (what do you do with voltage sources? current sources? open or short which one?). Also find the open circuit voltage across your terminals with V2 removed. I'm pretty sure this is what you would do.
  4. Feb 21, 2008 #3
    For 24, use nodal analysis. That'll give you an expression of Vnodal as a function of V3.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook