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T: To Study: Experimen Mesh Method Aim of Experiment: Apparatus

The document describes an experiment to solve a circuit using mesh analysis. The experiment involves using a DC circuit training system, wires, power supply and multimeter. Mesh analysis involves assigning a clockwise current to each closed loop and applying Kirchhoff's voltage law. This results in simultaneous equations that can be solved for the loop currents. The procedure involves connecting the circuit, measuring the mesh currents, and recording the current and voltage across each resistor.

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Mohsin Iqbal Department of Electrical Engineering
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415 views3 pages

T: To Study: Experimen Mesh Method Aim of Experiment: Apparatus

The document describes an experiment to solve a circuit using mesh analysis. The experiment involves using a DC circuit training system, wires, power supply and multimeter. Mesh analysis involves assigning a clockwise current to each closed loop and applying Kirchhoff's voltage law. This results in simultaneous equations that can be solved for the loop currents. The procedure involves connecting the circuit, measuring the mesh currents, and recording the current and voltage across each resistor.

Uploaded by

Mohsin Iqbal Department of Electrical Engineering
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Experiment: To study Mesh Method

Aim of experiment: Solve a circuit using mesh analysis

Apparatus:-
1. DC circuit training system.
2. Set of wires.
3. DC Power supply
4. Digital A.V.O. meter.

Theory:-
The method of analysis to be described is called mesh analysis.
The term mesh is derived from the similarities in appearance between the
closed loops of a network and a wire mesh fence. To solve an N mesh
circuit, a set of N simultaneous equations are needed. There are several
ways to derive a solution (i.e. Matrix algebra).
Essentially, the mesh-analysis approach simply eliminates the need to
substitute the results of Kirchhoffs current law into the equations derived
from Kirchhoff's voltage law. It is now accomplished in the initial writing
of the equations. The systematic approach outlined below should be
followed when applying this method:-
1. Assign a distinct current in the clockwise direction to each
independent, closed loop of the network. It is not absolutely necessary
to choose the clockwise direction for each loop current. In fact,
any direction can be chosen for each loop current with no loss in
accuracy, as long as the remaining steps are followed properly.
However, by choosing the clockwise direction as a standard, we can
develop a short and method for writing the required equations that
will save time and possibly prevent some common errors.

2. Indicate the polarities within each loop for each resistor as


determined by the assumed direction of loop current for that loop.
Note the requirement that the polarities be placed within each loop.
This requires, as shown in fig (1), (R1,R2), two sets of polarities
across it.

3. Apply Kirchhoffs voltage law around each closed loop in the


clockwise direction. Again, the clockwise direction was chosen to
establish uniformity and prepare us for the method to be introduced in the
next section.
a. If a resistor has two or more assumed currents through it, the total
current through the resistor is the assumed current of the loop in
which Kirchhoffs voltage law is being applied, plus the assumed
currents of the other loops passing through in the same direction,
minus the assumed currents through in the opposite direction.
b. The polarity of a voltage source is unaffected by the direction of
the assigned loop currents.
4. Solve the resulting simultaneous linear equations for the assumed
loop currents.
R5
A 1 A

R1 R4

R2 R3
A

E1 E2

Fig. (1) Mesh Circuit

Procedure:-
1. Connect the circuit of Figure (1)
2. measure each of the mesh currents by inserting an ammeter into the
top edge of each of the mesh windows in the circuit of Figure (1).
Write down the results in the table.
I1 I2 I3

Assumed Current
Direction

3- measure the current and voltage through each resistor and write down
the results in the table.

R1= R2= R3= R4= R5=


I (mA)

V (volt)

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