Help Calculating Thevenin Resistance

[gneill]

So that is the Thevanin voltage?

You should be in a position to answer that question yourself. Reread the definition and prescribed method of determining the Thevenin voltage.

 

[maherelharake]

Yes I believe it is based from previous responses. So now I need to find the shorted current, and use the Voltage I just found to find the Thevenin R?

 

[gneill]

Yes I believe it is based from previous responses. So now I need to find the shorted current, and use the Voltage I just found to find the Thevenin R?

Why? You found the R previously. Go back to post #9 and what led up to it.

 

[maherelharake]

That's what I thought, but my worksheet says that in order to find the R, I have to have an I first. Is there another way to find it using that procedure?

 

[gneill]

Well, perhaps they suggest that you do it that way, but it is not the only way. You can either find the resistance by shorting out the voltage sources, opening any current sources, and determining the resistance seen at the terminals, or you can determine the open circuit voltage and short circuit current and obtain R = V/I. You've already done the first method. If you want to do the second as well, fine. You'll get the same result.

 

[maherelharake]

I see. So just for my personal knowledge, how do you find the short circuit current? Is it by using loop rules?

 

[gneill]

I see. So just for my personal knowledge, how do you find the short circuit current? Is it by using loop rules?

That is one way. Any valid circuit analysis method that gets you where you want to go is fine. Use what you're comfortable with.

 

[maherelharake]

Ok. Thanks