Network Theory

We can apply Ohms law which we all know V=IR to the all simple networks or circuits but issue with this law is that when it comes to the lot of components like resistance, inductance, capacitors and sources of e.m.f. connected in different ways.

The combination of such components along with the energy sources will complicates the circuits more and such combination is known as network.

Usually network and circuits are the contemporary words that are normally used in the electrical network.

Network analysis:

It is nothing but the technique used to find the current from and voltage through the any of the branch in the circuit or network using lot of laws, and many techniques.

What is electric network?

"An electrical network is nothing but an combination of the energy resources and the different circuit components forms an complete network"

Circuit Element or component:

It's an individual component or element having two terminals and can be connected to the other circuit element is called as network element.

These network elements can be either active elements or passive elements; Active elements can provide energy or power supply to the network whereas passive elements are the elements which will store the energy or dissipate it in the form of heat.

Active Elementsàtransistor

Passive ElementsàCapacitor, resistor, inductor, and Diode

Where capacitor and inductor will store an energy and resistor will dissipate it in the form of heat.


It is nothing but an connecting node or we can say it will connect different points of the network with each other as shown in fig like PQ, QR, RS etc.

A branch may consist of more than one circuit component or element.

Junction point:

It is an point where more than three branches will meet is called as an junction point, point S in fig is an junction point.


This is thepoint in the network where two or more than two network elements are connected together is called asan Node of the network.

The junction point of the network are also the nodes of the network; in fig P,Q,R,S&T are the nodes of the network.