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## Homework Statement

Find the open circuit voltage V

_{0}, short circuit current I

_{SC}, and R

_{TH},

## Homework Equations

## The Attempt at a Solution

I found the equivalent resistance to be 20 ohms(just by combining resistors in parallel and series) and V

_{0}to be 30V, which I think might be wrong.

I did a nodal analysis at VA :

(VA-30)/10 + (VA)/15 +(VA)/30 =0

VA=10V

I

_{SC}=(VA)/30 I

_{SC}=0.33A

Then I found R

_{TH}=30v/0.33A=90 ohms

Shouldn't my R

_{TH}= Req?

I'm not really sure what I did wrong.

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