EKT 101 Electric Circuit Theory
Module 3
UNIVERSITY MALAYSIA PERLIS
EKT 101
ELECTRIC CIRCUIT THEORY
LABORATORY MODULE 3
SEMESTER I (2012/2013)
SCHOOL OF COMPUTER AND COMMUNICATION ENGINEERING
SEM I 2012/13
EKT 101 Electric Circuit Theory
Module 3
MODUL 3
CIRCUIT ANALYSIS
1. Test the theoretical analysis of series-parallel circuit through direct measurements.
2. Measure the resistance, voltages and currents of a series-parallel circuit.
3. To construct resistive circuits and analyze the circuits using Nodal and Mesh Analysis.
4. To test and demonstrate the validity of nodal analysis and mesh analysis through
experimental measurements.
EQUIPMENT/COMPONENT
Multimeter
DC Power Supply
Resistor
Breadboard
Jumper Wire
PROCEDURE
PART A: SERIES-PARALLEL RESISTANCE
1.
Using multimeter, measure actual resistances between terminals B-C, A-C, B-D and
A-D as shown in Figure 2. Calculate the percentage difference between the calculated
and measured values. Record all your answers in Table 1.
1.1 k
A
1k
B
3.9 k
4.7 k
SEM I 2012/13
C
2.7 k
D
EKT 101 Electric Circuit Theory
Module 3
Figure 1: Series- parallel Resistance
2.
Construct the circuit as shown in Figure 2 using the breadboard. Supply a fixed 5V
source from the DC power supply. Using voltmeters measure V1, V2 and V3.
Calculate the percentage difference between the calculated and measured values.
Record all your answers in Table 2.
3.
Insert ammeters in series with the elements whose currents are to be measured such as
in Figure 3. Obtain I2, I3 and I4. Calculate the percentage difference between the
calculated and measured values. Record all your answers in Table 2.
I2
A
V1
1k
B
V2
1.1 k
I3
3.9 k
I4
4.7 k
5V
C
V3
2.7 k
D
IT
Figure 2: Connecting voltage source and multimeters to a series-parallel circuit
PART B: NODAL ANALYSIS
1. Connect the circuit as shown in Figure 3 on the breadboard. Set to 15V. By using
multimeter, measure node voltages at V1, V2, and V3. Record all results in Table 3.2.
Compare the difference between the measured results and calculated results.
SEM I 2012/13
EKT 101 Electric Circuit Theory
V1
V S1
2.2k
Module 3
1.1k
V2
1k
V3
V4
_
+
4.7k
_
VS 2
3.9k
+
Figure 3: Circuit to be analyzed using Nodal Analysis method
PART C: MESH ANALYSIS
1. Connect the circuit as shown in Figure 4 on the breadboard. Set VS1 and VS2 to 15V. By
using multimeter, measure mesh currents I1, I2 and I3, then branch currents, Ia and Ib.
2. Record all the measurement in Table 4. Compare the difference between the measured and
calculated results.
2 . 2k 
1 . 1k
Ib
Ia
V S1
+
_
I1
4 . 7 k
1k 
I2
I3
3 .9 k
VS2
+
Figure 4: Circuit to be analyzed using Mesh Analysis method
SEM I 2012/13
_
EKT 101 Electric Circuit Theory
Module 3
PRE – LAB CALCULATION
1. Refer to Figure 1 calculate the equivalent resistance for each pair of terminals, B-C, AC, B-D and A-D. Record answers in Table 1.
2. Calculate the total resistance, RT and then total current, IT of the circuit in Figure 2.
Simplify the circuit into a single loop. Draw the equivalent circuit including the details.
From the simplified circuit, using KVL calculate V1, V2 and V3. Show all your
calculation work and insert the final answers into Table 2.
3. For the circuit shown in Figure 3, write down the nodal equations for the circuit and
solve for V2 and V3 if VS1 and VS2 = 15V. Show all the calculation involved and record
your calculation answers in Table 3.
4. Consider the circuit in Figure 4. Write down the mesh equations for the circuit and solve
for I1, I2 and I3 if both VS1 and VS2 are 15V. From the results, determine branch currents
Ia and Ib. Show all calculation involved and record all your answers in Table 4.
Note: For all theoretical calculation results students are strictly required to show their work before
the lab session. Otherwise they will be forbidden from participating the session. The calculation works
must be submitted together with the experimental results. .
SEM I 2012/13
EKT 101 Electric Circuit Theory
Module 3
UNIVERSITY MALAYSIA PERLIS
EKT 101
ELECTRIC CIRCUIT THEORY
LABORATORY MODULE 3
CIRCUIT ANALYSIS
SEMESTER I (2012/2013)
SCHOOL OF COMPUTER AND COMMUNICATION ENGINEERING
NAME:
________________________________________
MATRIX NU:
________________________________________
PROGRAMME:
_______________________________________
DATE:
______________________
SEM I 2012/13
EKT 101 Electric Circuit Theory
Module 3
RESULTS AND DISCUSSION
TABLE 1: Series –Parallel Resistance
Resistance
Calculated
Terminal
Measured
% Difference
B-C
A-C
B-D
A-D
TABLE 2: Voltage and Current Measurement for Series –Parallel Circuit
Circuit
Calculated
Measured
% Difference
Variables
V1
V2
V3
I2
I3
I4
IT
TABLE 3: Nodal Analysis
Parameter
V1
V2
V3
V4
SEM I 2012/13
Theoretical Result
Experimental
(PRE-LAB)
Result
% Difference
EKT 101 Electric Circuit Theory
Module 3
TABLE 4: Mesh Analysis
Parameter
Theoretical Result
Experimental
(PRE-LAB)
Result
% Difference
I1
I2
I3
Ia
Ib
For the percentage difference calculation you can use the following equation:
% Difference
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
Calculated  Measured
Calculated
X 100 %