Leyes De Kirchfhoot

Outline

. Electrical Circuits

• What are electrical circuits

• Who was Gustav Robert Kirchoft

• The two laws of Kirchoft

• Examples

• Conclusions

• References

Electrical Circuits

It is a complex conductor between positive and negative terminals; It is said that current flows from positive to negative, although in fact the flow of electrons goes from negative to positive. If bind electrics, such as light bulbs and switches and connect the ends (positive to negative) poles we have a connection in series. Connecting the Poles (negative to positive and negative to positive) is a parallel connection.

Gustav Robert Kirchhoff

(March 12, 1824 – October 17, 1887) this German physicist has made massive contributions to the fundamental understanding of black-body radiation emitted by heated objects, spectroscopy, and electrical circuits. He also worked with other famous names in science and came up with other profound breakthroughs and theories. Indeed, he is a man who made great leaps and bounds in the world of physics and chemistry and there are things worth finding out about this scientist.

During the time he was studying under Neumann, he made the first of many outstanding research contributions that were related to electrical current. In 1845, he announced Kirchoff’s laws and they allowed the calculation of currents, voltages and resistances in electrical circuits that had multiple loops. This further extended German mathematician Georg Ohm’s work.

A couple of years later, Gustav Kirchoff’s work would lead to recognize this error and prod him to come up with a better and keener understanding of how the theory of electrostatics and electric currents could be and should be combined.

Kirchoff's Laws

It's two 'rules' that allow to study circuits in a systematic way. These rules are deducted directly from the field equations. To formulate the laws you need to define some of the concepts

Circuit: A conductive path, which are sources of 'Fem'. (batteries).

Knot or node: Points in a circuit in which at least three conductors are attached.

•Nodes Act: is the equation of continuity - permanent rule. "The algebraic sum of currents entering a node is always zero."

•Law of mesh: the 'fundamental relationship', in entire career in a circuit is closed, the algebraic sum of the' Fem' and potential falls (RI) is equal to zero.

We observe that to properly implement these laws we need to establish a Convention:

•When, through the path, we are moving in the direction of flow, the fall of potential (RI) has (-) sign.

•If passing through a source of 'FEM.' we move from the (-) terminal to terminal (+), the 'FEM.' in question is taken with (+) sign.

First law of Kirchoff: "The sum of the value of inbound streams to a node is equal to the sum of the outgoing streams of that node". Node call back you to a point in which several drivers gather.

The current entering any junction is equal to the current leaving that junction. i1 + i4 = i2 + i3

Second law of Kirchoff: "The algebraic sum of a closed circuit voltage falls is equal to 0". It means that the sum of the applied loads, tensions must be equal to the applied

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