# Problem with the Thevenin equivalent resistance

• Engineering
• Amaelle
In summary, the conversation discusses finding the equivalent resistance from a capacitor point of view, specifically in regards to a schematic with an open switch. The solution states that the equivalent resistance is R1, but the person is unsure as they believe R2 and R3 are still involved. They also mention finding the Thevenin resistance and the usual procedure for doing so. Ultimately, the conversation ends with a question about the proper way to calculate Rth with the switch open.

#### Amaelle

Homework Statement
Find the thevenin equivalent resistance from the capacitor point of view
Relevant Equations
no equation needed just the diagram
Good day
I have a problem to find the equivalent resistance from the capacitor point of view

the solution says it's R1 but for me we still have R2 and R3 we have not deal with !

If that's your attempt at solution, you didn't try very hard.

The schematic shows an open switch S. If the switch was closed, the equivalent would be different. So how would you make the equivalent with the switch open?

the question is with switch open :)

What is the usual procedure for finding the Thevenin resistance?

From Fig.2 in order to calculate Rth we have to short circuit the E source and then R2 and R3 in series are short-circuited and only R1 remains in calculation loop.

Joshy

## 1. What is the Thevenin equivalent resistance?

The Thevenin equivalent resistance is a simplified representation of a complex electrical network, often used to analyze and solve circuit problems. It is the equivalent resistance that would be seen from two terminals of a circuit if all voltage sources were replaced with their internal resistances.

## 2. How is the Thevenin equivalent resistance calculated?

The Thevenin equivalent resistance can be calculated by first finding the open circuit voltage and the short circuit current of a circuit. The equivalent resistance is then equal to the open circuit voltage divided by the short circuit current.

## 3. What are the benefits of using the Thevenin equivalent resistance?

Using the Thevenin equivalent resistance allows for a complex circuit to be simplified and analyzed with a single equivalent resistance. This can save time and effort in problem solving and circuit design.

## 4. What are some limitations of the Thevenin equivalent resistance?

The Thevenin equivalent resistance assumes that the circuit is linear and does not take into account the effects of non-linear components. It also does not account for the effects of temperature and may not accurately represent the behavior of a circuit under different conditions.

## 5. How can the Thevenin equivalent resistance be used in practical applications?

The Thevenin equivalent resistance can be used in circuit analysis and design to determine the maximum power transfer, voltage levels, and current flow. It can also be used to troubleshoot and diagnose problems in a circuit by simplifying it and making it easier to understand.