# Homework Help: Thevenin Equivalent issue - I think I'm missing something

1. May 6, 2013

### Cazicami

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
Rtotal=35Ω

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

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2. May 7, 2013

### SammyS

Staff Emeritus

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 .