ENGINEERING DEPARTMENT
Electrical Section
Academic Year 2022-2023
Semester 2
EEPW2150/EGEL2110 – ELECTRICAL PRINCIPLES/Electric
Circuits 1
PRACTICAL REPORT
Experiment No. 1
Verification of Voltage & Current Division Rule
Student ID No.
Section
Student’s name
Date of submission
ASSESSMENT:
Assessment
__/__/2023
NOTE:
Max.
Marks
Marks
Awarded
For minor plagiarism:
Both student who copied and student
who allowed another student to copy
his/her work will be given Zero Mark.
Performance
2
Data Collection &
Analysis
2
Results & Discussion
2
For late submission:
Lab Assessment
4

1 day late is 10% deduction

2 days late is 20% deduction

3 days onward is 100% deduction
Total
10
Staff Signature
(Zero mark will be given)
Prepared by:
Er. Nelson/Er. Ahmed
May 2022
[EEPW2150 – Electrical Principle] Practical
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Aim/Objective
To study and verify Ohm`s law
II. Introduction
Ohm`s Law– a law stating that electric current is proportional to voltage
and inversely proportional to resistance.
𝑽𝑻 = 𝑰𝑻 𝒙 𝑹𝑻
Voltage Division Rule
If two or more resistors are connected in series with a voltage source,
the total battery voltage is divided across each resistor.
𝑉𝑇𝑜𝑡𝑎𝑙 = 𝑉𝑅1 + 𝑉𝑅2
𝑉𝑅1 =
𝑅1
𝑥 𝑉𝑇𝑜𝑡𝑎𝑙
𝑅1 + 𝑅2
𝑉𝑅2 =
𝑅2
𝑥 𝑉𝑇𝑜𝑡𝑎𝑙
𝑅1 + 𝑅2
Current Division Rule
If two or more resistors are connected in parallel with a battery
(current source), the total battery current will be divided among the
resistors.
𝐼𝑇𝑜𝑡𝑎𝑙 = 𝐼𝑅1 + 𝐼𝑅2
𝐼𝑅1 =
𝑅2
𝑥 𝐼𝑇𝑜𝑡𝑎𝑙
𝑅1 + 𝑅2
𝐼𝑅2 =
𝑅1
𝑥 𝐼𝑇𝑜𝑡𝑎𝑙
𝑅1 + 𝑅2
III. Apparatus and Materials Required
Sn
1
2
3
4
Quantity
Materials
Digital Multi-meter (ammeter)
3 pcs
Digital Multi-meter (voltmeter)
2 pcs
Resistors
2 pcs
Low voltage DC power supply
1 unit
Table 2.1 Materials used
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IV. Experimental Set-up
Figure 2.1 Practical Verification of Voltage Division Rule
Figure 2.2 Practical Verification of Current Division Rule
V. Procedure(s)
1. Configure the multi-meters into DC voltmeter and DC ammeter as per the
requirement.
2. Switch ON the power supply and fix its voltage as per your requirement 10V, 15V,
20V, by connecting a voltmeter.
3. Make the connections as per the circuit diagram.
4. Measure voltages(V) across resistors and the current (I) flowing through the resistors
and record in the table.
5. Compare the measured value, with the calculated value, and give your opinion.
[EEPW2150 – Electrical Principle] Practical
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VI. Health and Safety
(Attached the safety form filled in by the student)

Use only DC low voltage.

Use insulated wire to prevent electric shock

Fiber casing for resistors
VII. Data Collection and Analysis (2.0 Marks)
Table 1.1 Practical Verification of Voltage
Resistance
Value
𝑽𝑻𝒐𝒕𝒂𝒍
10 V
15 V
20 V
𝑹𝟏
Calculated value from voltage
division
Measured value
𝑽𝑹𝟏
𝑹𝟐
𝑽𝑹𝟐
Voltage Across
R1
𝑽𝑹𝟏
𝑹𝟏
=
𝒙 𝑽𝑻𝒐𝒕𝒂𝒍
𝑹𝟏 + 𝑹𝟐
100 100 2.4
7.6
2.325
100 1000 1.41 13.61 1.363
330 1000 15.07 4.90 4.962
Voltage Across
R2
𝑽𝑹𝟐
Remarks
𝑹𝟐
=
𝒙 𝑽𝑻𝒐𝒕𝒂𝒍
𝑹𝟏 + 𝑹𝟐
7.674
13.636
15.037
Table 1.2 Practical Verification of Current
Resistance
Value
Supplied
Voltage
𝑽𝑻𝒐𝒕𝒂𝒍
10 V
15 V
20 V
𝑹𝟏
𝑹𝟐
Measured Value
from ammeter
𝑰𝑻𝒐𝒕𝒂𝒍
𝑰𝑹𝟏
𝑰𝑹𝟐
Calculated value from current division
Current through
R1
𝑰𝑹𝟏 =
10
0
10
0
33
0
33
0
11
9
17
9.
1
10 33 24
0 0 0
𝑹𝟐
𝒙 𝑰𝑻𝒐𝒕𝒂𝒍
𝑹 𝟏 + 𝑹𝟐
2 90 27.67
9
4 13 41.65
4 5.
5
5 18 55.81
8. 1.
7 3
Current through R2
𝑰𝑹𝟐 =
𝑹𝟏
𝒙 𝑰𝑻𝒐𝒕𝒂𝒍
𝑹𝟏 + 𝑹 𝟐
Remarks
91.32
137.44
184.18
Note: Show your complete Solution.
A. Calculated value from Voltage Division Rule.
[EEPW2150 – Electrical Principle] Practical
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At 10volts supplied voltage
VR1 =
VR2 =
At 15volts supplied voltage
VR1 =
VR2 =
At 20volts supplied voltage
VR1 =
VR2 =
B. Calculated value from Current Division Rule
At 10volts supplied voltage
IR1 =
IR2 =
At 15volts supplied voltage
IR1 =
[EEPW2150 – Electrical Principle] Practical
IR2 =
5
At 20volts supplied voltage
IR1 =
IR2 =
VIII. Results and Discussion (1.0 Mark)
(Explain here how you calculate the voltage and current using Voltage Division and Current Division)
IX. Conclusion and Recommendation (1.0 Mark)
(Explain here what you have learned from the experiment)
[EEPW2150 – Electrical Principle] Practical
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Student’s name and signature/Date
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