What is the defenition of Thevenin's theorem and Norton's theorem?

Question

These are used to solve a network in Electrical.

Answer 1

In electrical circuit theory, Thévenin's theorem for electrical networks states that any combination of voltage sources , current sources and resistors with two terminals is electrically equivalent to a single voltage source V and a single series resistor R. For single frequency AC systems the theorem can also be applied to general impedances, not just resistors. The theorem was first discovered by German scientist Hermann von Helmholtz in 1853, but was then rediscovered in 1883 by French telegraph engineer Léon Charles Thévenin (1857-1926).

This theorem states that a circuit of voltage sources and resistors can be converted into a Thévenin Equivalent, which is a simplification technique used in circuit analysis. The Thévenin Equivalent can be used as a good model for a power supply or battery (with the resistor representing the internal impedance and the source representing the EMF). The circuit consists of an ideal voltage source in series with an ideal resistor.




Norton's theorem for electrical networks states that any collection of voltage sources and resistors with two terminals is electrically equivalent to an ideal current source, I, in parallel with a single resistor, R. For single-frequency AC systems the theorem can also be applied to general impedances, not just resistors. The Norton equivalent is used to represent any network of linear sources and impedances, at a given frequency. The circuit consists of an ideal current source in parallel with an ideal impedance (or resistor for non-reactive circuits).

Norton's theorem is an extension of Thévenin's theorem and was introduced in 1926 separately by two people: Hause-Siemens researcher Hans Ferdinand Mayer (1895-1980) and Bell Labs engineer Edward Lawry Norton (1898-1983). Mayer was the only one of the two who actually published on this topic, but Norton made known his finding through an internal technical report at Bell Labs.

Answer 2

2

Answer 3

easiest to look on wikipedia for accurate definitions.
both have ideas which work on how current and voltage operate within an electrical network.