İKU
Department of
Electronic Engineering
EE310
Circuit Theory
1
EXPERIMENT 7: VERIFICATION OF THEVENIN AND
NORTON THEOREMS AND MAXIMUM POWER TRANSFER
1.
Objectives
To verify
the practical usage of Thevenin and Norton Theorems.
To verify maximum power transfer theorem.
2.
Preliminary work
For the below given circuit,
find
I
L
load resistor current
, V
th
(Thevenin Voltage
source)
, R
th
(Thevenin OR Norton Resistor)
and I
N
(Norton Current source)
.
Repeat previous step by proteus simulation
.
o
Draw the load resistance power with respect to R
L
as a parameter.
Work out report questi
ons in advance, some of these questions will
probably
be asked
in LAB quiz.
3.
Experiment Equipments
:
KL

21001 main experiment unit
, Resistors
.
Procedure
1.
Set up the circuit given below.
2.
Measure I
L
load current.
Fill this value in
the result
table given belo
w.
3.
Measure the
open circuit
voltage across
a
and
b
terminals
(V
ab
=V
th
)
.
Fill this value in
the
result
table given below.
4.
Then measure short

circuit current across
a
and
b
terminals
. Note that this current is the
Norton current (
I
N
).
Fill this value in
the
result
table given below.
5.
Now disconnect voltage sources from the circuit and replace them with short circuit. For
this state
,
measure the net resistance across
a
and
b
. Note that this value is the Thevenin (or
Norton) Resistance
(R
TH
)
across
a
and
b
.
Fil
l this value in the result table given below.
R
L
=330
Ω
††
†††
㐷4
Ω
†††
㔶5
Ω
220Ω
33
0Ω
47
0Ω
IL
İKU
Department of
Electronic Engineering
EE310
Circuit Theory
2
EXPERIMENT 7 REPORT: VERIFICATION OF THEVENIN AND
NORTON THEOREMS AND MAXIMUM POWER TRANSFER
Date:
Gr
o
up No:
Name:
Surname:
Name:
Surname:
Results
Questions:
1.
What is equivalent circuit?
2.
How could these equivalent circ
uits (Thevenin, Norton) be useful for circuit
analysis?
3.
How could you found load current by using Thevenin equivalent circuit?
4.
How could you found load current by using
Norton equivalent
circuit?
5.
What should be the load
resistance
value in order to have ma
x power?
6.
What are the other equivalent circuits that you know?
7.
What causes
the
difference between measured and calculated val
u
es?
Calculated
Proteus
Measur
ed
V
TH
R
TH
I
N
RL=330
I
L
P
RL
RL=47
0
I
L
P
RL
RL=
560
I
L
P
RL
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