Network Analysis

Introduction To Network Analysis

Network Analysis is the branch of electronics as well as electrical engineering. It is basically defined as the interconnection of the electrical components. It helps in finding a lot of parameters like voltage of the circuit, current of the circuit which is traveling through the network components. In calculating the supply of voltage and current, the series and parallel combinations are taken to find their values. These make the connections in series or parallel the connections are made on what type of combination we are going to choose. Below there are some terminologies that are discussed.


Terminologies Used in Network Analysis

  1. Terminal:  It is a point through which the connection in the whole circuit will be maintained. 

  2. Component: A component is made by using one or more terminal, which will help in the supply of the current.

  3. Nodes:  Node is a point through which two or more than two circuits or the element of the circuits can be connected to each other.

  4. Branch: The branch is defined as the connection between two nodes.

  5. Ports:  Ports are basically input and output signals.

  6. Mesh: Mesh is a complete circuit of terminals and having different branches that are connected to each other through ports and forming a working circuit.


There are Different Types of Circuits that are Discussed Below:

  1. Series Circuit: In this circuit, the resistance is connected in series and they are added directly using the formulation of the series circuit. The single battery and voltage are used and we get the value of all these quantities by using only law that is the Ohm’s law.

  2. Parallel Circuits: In these circuits, the number of resistance is not attached in a single branch but they are attached on different branches and that branches are connected to each other through ports. They are making the circuit in which the current through them is the same but each resistance has a different voltage. 

  3. Bridge circuits: In the bridge circuits are of two types one is the balanced bridge circuits and the other one is unbalanced circuits. The balanced bridge circuits mean when the ratio of four resistance divided into two different groups is equal. Like R1/R2 is equal to R3/R4. But in the unbalanced circuits, these ratios are not equal to each other.


Circuit Analysis Important Questions:

A few important questions are discussed below:


1. What do you Understand by the Terms Bilateral and Unilateral Network?

The bilateral is defined as the connection of voltage and current and terms like resistance, inductor, and capacitor are used in the circuit for the flow of current in the same direction. On the other hand, the unilateral network is defined as the flow of current but in different directions. Here in the unilateral, the examples are diode, vacuums.


2. What Do You Mean by Electrical Circuits?

Electrical circuits are the combination or the interlinking of the resistance with current or voltage that forms the complete circuit. Also with resistance, we can put inductor or capacitor.


3. Name the Property that is Used in the Additivity of the Electrical Circuit Analysis?

The name of the property is a superposition that is used in the additivity. 


4. State Ohm’s law?

Ohm’s law states that in an electrical circuit, the current flowing through the circuit is directly proportional to the voltage of the circuit, and resistance throughout the circuit remains the same. The ohm’s law is valid only for the cases when the physical conditions like temperature, resistivity, and material of the conduction remain the same.


Network Analysis Model Question Paper:

The model questions of the network analysis are given below:


1. What will be the Value of the Voltage When the Current is Zero?

The value of voltage will also be zero as the current is zero.


2. What is the Meaning of Impedances?

It is defined as the matching of resistance with other resistance which is important to pass the band.


3. Define Kirchhoff’s Current Law?

The total sum of the incoming and the outgoing current will be equal to zero.


Fun Facts

  1. There are two types of transformation of network analysis that delta connected and stay connected. The amazing thing is that to get star connected transformation we need to convert the delta or vice-versa.

  2. To change the ports we just need to change the series and parallel combination in the circuit.

  3. These circuits of different combinations sometimes series and sometimes parallel, or they can be a mesh of branches. They are always following some kind of topology. 

FAQ (Frequently Asked Questions)

1. What Do You Understand by the Ideal Transformer?

The ideal transformer is defined as when there is no power loss in the circuit during the output. The change in the input voltage does not affect the output voltage. Along with no leakage in power loss, there is also no leakage in copper or iron core. The coils which are used in the formation of a transformer that is primary and secondary coils, in the ideal transformer, there is zero resistance in these circuits. One of the most important properties of the ideal transformer is that they provide 100% efficiency in the working of the circuit as there is no power loss.

2. Explain the Reason Behind the Transformer Rated in kVA?

The reason is that copper loss in the circuit depends upon the current in the circuit whereas iron loss in the circuit depends upon the voltage. Therefore the transformer rated as kVA, not kW. The other reason behind the transformer rated in kVA is that during the manufacturing of the transformers, there is no information about what kind of load will be going to attach to them. The load can be in the form of resistive, inductive, or capacitive. So in order to make them available for use, they are being rated on the basis of current and voltage that is going to provide to the loads rather than using a fixed power W.