# Thevenin theorem and norton theorem

• stupif
In summary, Thevenin's and Norton's theorems are used in circuit analysis and can greatly simplify certain tasks by abstracting portions of simple circuits into a voltage or current source and a resistor. This concept of black boxes and abstraction is beneficial for electrical engineering.
stupif
can someone tells me what is purpose of using thevenin"s and norton"s theorem??
and what these theorems contribute to electrical engineering's field?

thank you

What's the purpose of a ball-peen or framing or sledge hammer? They're all used to hit things with, but are better at particular jobs. So it is with Thevenin's and Norton's: they're both used for circuit analysis, but can greatly simplify certain jobs, and allow you to abstract entire portions of simple circuits, reducing them down to a simple voltage or current source and a resistor.

The whole concept of black boxes and abstraction makes EE's lives easier.

## 1. What is Thevenin's theorem?

Thevenin's theorem is a fundamental concept in circuit analysis that states that any linear two-terminal circuit can be replaced by an equivalent circuit consisting of a single voltage source, a single resistor, and a load resistor.

## 2. How is Thevenin's theorem different from Norton's theorem?

Thevenin's theorem deals with replacing a complex circuit with a voltage source and a resistor, while Norton's theorem replaces the same circuit with a current source and a resistor. Thevenin's theorem is useful for analyzing circuits with many voltage sources, while Norton's theorem is more useful for circuits with multiple current sources.

## 3. How do you determine the Thevenin equivalent circuit?

To determine the Thevenin equivalent circuit, you must find the open-circuit voltage (Voc) and the equivalent resistance (Req) of the original circuit. Voc is the voltage measured across the terminals of the open-circuited circuit, and Req is the resistance seen when looking into the circuit from the load terminals. The equivalent circuit will consist of a voltage source with a value of Voc and a resistor with a value of Req.

## 4. What are the benefits of using Thevenin's theorem in circuit analysis?

Thevenin's theorem allows for a complex circuit to be simplified into a single voltage source and resistor, making it easier to analyze and understand. It also allows for the use of superposition, where the effects of each individual source can be analyzed separately and then added together to find the total response of the circuit.

## 5. Can Thevenin's and Norton's theorems be used for non-linear circuits?

No, Thevenin's and Norton's theorems can only be applied to linear circuits. Non-linear elements like diodes and transistors do not follow the same rules as linear elements and therefore cannot be analyzed using these theorems.

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