Calculating Thevenin Voltage in Circuit w/Load Resistor

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    Thevenin Voltage
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To calculate the Thevenin resistance in a circuit with a load resistor, the load should be removed. The formal method involves replacing the load with an open circuit to find the output voltage and a short circuit to determine the output current, with the Thevenin resistance being the ratio of V to I. Alternatively, all voltage sources can be shorted and current sources opened to find the Thevenin resistance. The Thevenin voltage can be computed by applying known load resistances at the output terminals, often using an infinite resistance for one of the loads. Understanding these methods is essential for accurate circuit analysis.
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I was wondering,how do we calculate the thevenin resistance in a circuit with a load resistor?Do we remove the load?How do we calculate the voltage at the load terminals?
 
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esmeco said:
I was wondering,how do we calculate the thevenin resistance in a circuit with a load resistor?Do we remove the load?How do we calculate the voltage at the load terminals?

Well, there are a couple of ways you can calculate the thevenin resistance. The formal way would be to replace the load with an open and then calculate the output voltage there and then to replace the load with a short and then calculate the output current there. The ratio of the calculated V/I is the thevenin resistance.

You can also remove all voltage sources and current sources (short voltage sources and open current sources and then determine the thevenin resistance. You would remove the load resistance.
 
you can compute the thevenin voltage and thevenin resistance by applying two different and known load resistances to the output terminals. often one of those loads is an infinite resistance (then the output voltage is the thevenin voltage), but it doesn't have to be.
 
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