Nodes, Branches and Loops of a CircuitPublished on 24/2/2012 and last updated on 13/8/2018
An electric circuit does have three conceptual things as mentioned below.
Nodes of Electric CircuitThe point through which an circuit element is connected to the circuit is called node. It is better to say, node is a point where, terminal of two or more circuit elements are connected together. Node is a junction point in the circuit. In the above circuit nodes are indicated by bullets.
NB:- If three is no element between two or more connected adjacent nodes, these nodes can be recombined as a single node.
Finally, the circuit can be redrawn as,
Branch of Electric CircuitThe elements connected to an electric circuit is generally two terminal element. When, one circuit element is connected to the circuit, it connects itself through both of its terminals, to be a part of a closed path.
Any of the circuit elements, when connected to the circuit, it is definitely connected between two nodes of the circuit. When an element exists between two nodes, the path from one node to another through this element is called branch of the circuit.
The branch of an electric circuit can be defined more precisely, as the portion of the circuit between two nodes which can deliver or absorb energy. As per this definition, the short circuit between two nodes is not referred as branch of electric circuit.