Experiment 3: Series - Parallel DC Circuits Procedure Part A

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AEEE221

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Experiment 3
:
Series
-

Parallel

DC Circuits


Instructor’s Signature:
........................................

1

Experiment 3
:

Series

-

Parallel

DC Circuits

Objectives



To investigate the characteristics of a series
-

parallel DC circuit
.

Procedure

Part A

The following circuit
, (
shown in Figure
3
.1)

will be built on the breadboard. All the components will be provided
by
your instructor.


Figure 3
.1

Circuit Analysis

(This Section is to be completed at home)

1.

By using simple analysis techniques,
find all unknown parameters of the above circuit and complete Table
3.1. Use the empty box below for

your calculations.


Note:
Make sure that you always use the correct units.

V
1

V
2

V
3

R
23





I
1

I
2

I
3

R
T





Table 3
.1




AEEE221



Experiment
3
:

Series
-

Parallel

DC Circuits

Instructor’s Signature: ........................................

2

Measurements

2.

Construct the circuit shown in Figure 3.1, but
do not
connect the voltage source.

3.

Measure and record
R
23

and
R
T

in T
able 3.2

4.

Switch on and adjust the voltage source at
10V
.
Then connect the circuit on the source.

5.

Make the required measurements to complete Table 3.2.

R
23 (meas.)

R
T(meas.)

E




V
1(meas.)

V
2(meas.)

V
3(meas.)




Table 3.2

6.

By using Ohm’s Law,
calculate

t
he three different currents of the circuit (
I
1
, I
2

and

I
3
) and complete Table 3.3.

Use the empty box below for your calculations.

I
1
(meas.)

I
2
(meas.)

I
3
(meas.)




Table 3.3



Part B

1.

Set the variable resistor provided to you, at the value of
R
23
.

Then, b
uild the circuit shown in Figure 3.2.


Figure 3.2


2.

Measure V
1
(meas.)

and V
23
(meas.)
, and then calculate V
23
(calc
.)

and
I
1

(calc
.)

to

complete Table 3.3.

V
1 (meas.)

V
23 (meas.)

V
23 (calc.)

I
1 (calc.)





Table 3.3





AEEE221



Experiment
3
:

Series
-

Parallel

DC Circuits

Instructor’s Signature: ........................................

3

Part
C

1.

Set the variable resistor provided to you, at the value of
R
T
.

Then, build the circuit shown in Figure 3.3.


Figure 3.3


2.

Measure V
T

and I
T
, and record the values in Table 3.4.

V
T (meas.)

I
T (meas.)



Table 3.4

3.

Discuss the results of the three parts of

this experiment (Voltage drops relation, currents relation, resistance
equivalents e.t.c.).

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