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**CIRCUIT ANALYSIS AND TECHNIQUES**

**Circuit Analysis and Terminology**

In order for someone to be able to analyse a
circuit, he or she must become familiar first with the basic circuit
terminology.

Consider the circuit below:

On this circuit there *
seven resistances*, *two voltage sources*
and *one current source*.

A __node__ is a point in the circuit
where two or more circuit elements join.

The current circuit has seven nodes (points ** a**
to **g**). Observing now the figure below, points **b1** and **b2** are
considered to be the same point as node **b. **The same happens to points **
g1** and **g2** which are considered to be the same point as node **g**.
This is due to the fact that there is no circuit element between these points so
they are not considered as separate nodes and are ignored.

A __path__ is traced through a set of
adjoining elements without passing through a node more than once. In the figure
below three different example paths are presented:

A __branch__ is a path containing one
circuit element that lays between two nodes. On the figure below the ten
branches that are contained in the circuit are presented:

A __closed path__ or __loop__
is formed when a path is traced such that the path ends at the original node. In
the figure below five closed paths are presented.

A __mesh__ is a special type of loop
that does not contain any other loops within it. On the figure below there are
four meshes