Thevenin's theorem using this to find the current in a resistor pls help?

Question

this has really got me confused im ment to use Thevenin's theorem to determine the current in a resistor on a simple DC circuit, when i type Thevenin's theorem into a google search it just confuses me more i dont understand how to apply that formalua to a given circuit, i was hoping to find a formalua triangle Eg V = I x R, XL = 2(pie, 3.14)fL, ect ect but it seems much more complicated than that

could you please suggest any useful links or advice
many thanks

Answer 1

The Thevinin equivalent of a DC circuit is merely a voltage source in series with a resistor. The value of the voltage source is the open-circuit voltage and the value of the resistor is this voltage divided by the short-circuit current. If you have the circuit diagram, you can calculate these values, or you can measure them. Without more information there isn't more I can give you.

Answer 2

I reviewed this link and the presentation is fairly good and clear.
If you have a specific sample problem you would liked solved then that may be helpful.

http://en.wikipedia.org/wiki/Thevenin's_theorem

Answer 3

try this one:

http://en.wikipedia.org/wiki/Thevenin

click the theorem on the site

i hope that this helps