Segunda Lei de Kirchhoff - Exercícios resolvidos!

Summary and applications of Kirchhoff's second law in electrical circuits. We explain the definition and formula step by step with nodal analysis, examples and solved exercises. The law of voltage or law of meshes (there can be 2, 3, 4 or more meshes) is the name given to this law in books and PDF handouts. The video explains it in the simplest way possible to understand with a complete introduction and a complementary article on the Mundo da Elétrica website. Among the objectives of this video, we highlight: Define what meshes are and how they appear in electrical circuits. Present the statement and the appropriate explanation about Kirchhoff's second law Demonstrate an example of application. We address the following items throughout this video: Kirchhoff's second law is a complement to the first law and deals exclusively with the meshes of a circuit and for this it deals with the voltage on the components of this circuit. It can also be called the law of voltages or law of meshes. A mesh is a closed path in a circuit, and in a simple series circuit there can only be one mesh, but in mixed and parallel circuits there are more than one mesh depending on the configuration of the circuit. Kirchhoff's second law states in its statement that the sum of the voltages in a mesh is equal to zero. It is necessary to polarize the components for a correct analysis of the circuit. It is recommended to analyze all the meshes always in the same direction, so that the current input of the component is positive and the output is negative. It is essential to know and understand Ohm's law well in order to use mesh analysis. Practical example of mesh analysis using Kirchhoff's second law. Highlighted parts in this video: 00:50 - Kirchhoff's second law uses the voltage quantity for analysis, and its statement says that in a mesh the sum of this voltage is equal to zero. 01:09 - Kirchhoff's laws are used to analyze electrical circuits, so it is very important to understand how they work and their characteristics. 01:43 - Within the circuits there will be associations of resistors that must be well understood so that a circuit can be correctly analyzed. 02:10 - In addition to the association of resistors in series and parallel, in the vast majority of cases there will also be circuits where the two associations are presented forming mixed associations. 02:47 - In the same way as resistors, voltage sources can also be associated. 03:02 - The use of Ohm's law for circuit analysis is constant when we think about electrical calculations. 03:48 - Kirchhoff's laws consider analysis for direct current circuits. 04:11 - We present examples of the use of Ohm's law. 04:48 - In circuit analysis, we often think about just one fixed resistor, but there are variable resistors that can be inserted into electrical circuits. Other videos that complement this subject: Calculating Nominal Current in a Three-Phase Motor! |    • Cálculo de Corrente Nominal em motor Trifá...   What is direct current and alternating current? |    • O que é corrente contínua e corrente alter...   #MEL_00306 -- The World of Electricity is an electricity channel with quality videos for you to learn on your cell phone, tablet or on your living room TV. Electricity for everyone! Online classes, PDF manuals, electrical diagrams and explanations! Join the World of Electricity: On Youtube (click and subscribe): http://goo.gl/vXru8M World of Electricity website: http://www.mundodaeletrica.com.br World of Electricity Facebook:   / mundodaeletrica   World of Electricity Google Plus: https://plus.google.com/+Mundodaeletr... World of Electricity Twitter:   / mundodaeletrica