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!

Thevenin Equivalent issue - I think I'm missing something

  1. May 6, 2013 #1
    1. The problem statement, all variables and given/known data

    Given the circuit (Attached in image) Find the thevenin equivalent circuit.

    I know its a fairly simple thing, But I am not understanding where the lecturer is getting this answer from, unfortunately his solutions just state the voltage so I feel like I must be missing something important.

    2. Relevant equations
    Vth= (R1/Rtotal)xVtotal

    3. The attempt at a solution

    I tried finding the voltage dropped over the 10Ω + 5Ω resistors, which I found to be 4.3v

    Vth= (R1/Rtotal)xVtotal = 4.3v
    Where R1 = 10Ω+5Ω

    But the lecturers solutions simply say Vth=2v

    Any help is appreciated
    1. The problem statement, all variables and given/known data

    2. Relevant equations

    3. The attempt at a solution

    Attached Files:

  2. jcsd
  3. May 7, 2013 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Gold Member


    What's the voltage across the output if there's no load? I.e., there is no current drop across the 10 kΩ resistor. You have a simple voltage divider with 20kΩ and 5kΩ .
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted

Similar Threads - Thevenin Equivalent issue Date
Find the Thevenin Equivalent circuit Mar 14, 2018
Thevenin's equivalent circuit for capacitor Jan 28, 2018
Thevenin Equivalence: Is my workings correct? Jan 13, 2018
Thevenin Equivalent Problem Dec 11, 2017