KVL and KCL

Welcome everyone! ....                   

From today we are going to start the new chapter in our field of technology.

This subject is common and very much required for both electrical and electronics departments and it is about network theory.

And also from today an interesting fact about science or nature or health or our livelihood is also been going to be posted at the end of the topic. So stay tuned.

NETWORK THEORY  :

Network theory is the branch of electrical and electronics field which incorporates the analysis and design of circuits

Okay let us see some important terms related to network theory.

ELECTRICAL NETWORK  :

Interconnection of circuit elements is simply called an electrical network.

Node :

The junction meeting two or more branches in an electrical network is called a node.

Kirchhoff’s laws play a major role in the analysis of electrical circuits.

Kirchhoff’s law :

Gustav Kirchhoff : German physicist.

He proposed two laws which decreases the complexity and makes the analysis of interconnection of any number of circuit elements in an electrical network.

 1. Kirchhoff’s Current Law

 2. Kirchhoff’s Voltage Law

Kirchhoff’s Current Law

This law states that the algebraic sum of currents meeting the junction or node of an electrical network is zero

                                                                                      (or)

The algebraic sum of the currents entering the junction or node are equal to the algebraic sum of currents leaving the node.

                                                       

                                               I₁+I₂+I₃-I₄-I₅ = 0 …………. (1)

The above equation says that  KCL obeys the law of conservation of energy.

                                  I₁+I₂+I₃ = I₄+I_5.

Kirchhoff’s voltage law

This law states that the algebraic sum of voltages around a closed loop moving in same direction is zero.

                                                                             

                                             V₁+V₂+V₃+V₄ = 0.

This is all about KVL and KCL.

Everyday is very joyful when we learn some interesting things, so we look forward to post some useful facts on every posts...

TODAY’S FACT :

 Science day in Switzerland is dedicated to Ex - Indian President ..and a great scientist  Dr.APJ Abdul Kalam..on  May 26...really very inspirational to share this. We are all proud to share this news with you... 

Really... inspirational...                        

Thanks for visiting us... 

source transformation

SOURCE TRANSFORMATION

Welcome to everyone… till today we have met with basic theme of our blog which includes some basic concepts of electrical field and electronics.

In electrical field we have covered the introduction concepts..

     1. Introduction.

     2. Circuit elements.

     3. Energy sources.

     4. Alternating sources.

Today we are again going through electrical concepts. One of the basic concepts is source transformation i.e. any practical voltage source in series with an internal impedance can be replaced with a current source in parallel with internal impedance.this means that the voltage souce and current source are mutually transferrable.

                                                              

     

Let V be the voltage source with an internal impedance R₁ in series  and a load resistance R_L then I₁ be the  current at load terminal

                                                                   I₁= v/(R₁+R_L) …………..(1)

                                                          

Let I be the current source with an internal impedance R₂ in parallel and a load resistance R_L then the current at load terminal

                                                                I₂= I R₂/(R₂+R_L) ……….(2)

                                                                             (1) = (2)

                                                                 v/(R₁+R_L) = I R₂/(R₂+R_L)   

                                                                   (R₁+R_L) = (R₂+R_L)

                                                                             R₁ = R₂

     This concludes that any practical voltage source in series with an internal impedance can be replaced with a practical current source with the same resistance In parallel with it.