BEKU 1123 ELECTRIC CIRCUIT I
SEMESTER 2 SESSION 2022/2023
Assignment 1 (5%, 60 minutes, Individual work, due Tuesday 13th of Jun 2023 at 12 pm)
Instruction:
Demonstrate your ability to analyse electrical circuits using Ohm’s Law and Kirchhoff’s Laws by
following the instruction below:
1. You are designing an electrical lighting circuit for a wedding ceremony event using light bulbs
connected in series and parallel. Your circuit design is shown in Figure 1. You want to estimate
whether the 24V 10 amp-hour battery that you have can last to power up the light bulbs
throughout the 5 hours wedding event. You also would like to know if the current through
each bulb is less than 0.9 amp maximum allowable current and you need to confirm the
answer with KCL. Finally, you want to find the equivalent resistance for each bulb to simulate
the circuit in a circuit simulator from http://www.falstad.com/circuit/ to check your answer.
You must copy and paste the screenshot of the simulated circuit, highlight the results,
AND copy and paste the link using File\ExportAsLink.
5W
24 V
11 W
18 W
5W
11 W
18 W
Figure 1
Assessment Rubric
Note: Half marks are given for incomplete and imperfect answer on each level.
Not achieve
0
Provide no
answer or all the
steps are wrong
Beginning
1
Demonstrate the
application of the
theorems in the
circuit analysis.
Developing
2
Demonstrate the
application of the
theorems in the
circuit analysis.
Provide
explanation on
the steps.
Accomplished
3
Demonstrate the
application of the
theorems in the
circuit analysis.
Provide
explanation on
the steps, relating
to the
fundamentals
and first
principles.
Exemplary
4
Demonstrate the
application of the
theorems in the
circuit analysis.
Provide
explanation on
the steps, relating
to the
fundamentals and
first principles, as
well as verifying
with circuit
analysis
software.
Perfect
5
Demonstrate the
application of the
theorems in the
circuit analysis.
Provide
explanation on
the steps, relating
to the
fundamentals and
first principles,
verifying with
circuit analysis
software, as well
as providing
concluding
remarks on the
design.
1
About assignment 1:
This assignment is worth 5 marks of the total final marks. Spend approximately 60 minutes i.e. 15
minutes answering time with 45 minutes study or preparation time*
LO1 Analyze electrical circuits using Ohm’s Law and Kirchoff’s Laws. (PO1, WK3,WP1)
According to EAC programme standard:
WP1 – Depth of knowledge - Cannot be resolved without in-depth engineering knowledge at the level of one or more of
WK3, WK4, WK5, WK6 or WK8 which allows a fundamental-based, first principles analytical approach.
WK3 - A systematic, theory-based formulation of engineering fundamentals required in the engineering discipline.
* based on SLT UTeM guideline: 5 marks X 3 credit = 15 minutes, and rule of thumb, 4 X 15 minutes = 45 minutes
assignment study time
2
BEKU 1123 ELECTRIC CIRCUIT I
SEMESTER 2 SESSION 2022/2023
Assignment 2 (10%, 150 minutes, Individual work, due Tuesday 13th of Jun 2023 at 12 pm)
Instruction:
Demonstrate your ability to analyse DC circuit using Superposition, Thevenin’s, Norton’s and
Maximum Power Transfer by following the instruction below:
1. Use the superposition principle to find 𝑖𝑖0 and 𝑣𝑣0 in the circuit of Figure 1. Use manual
calculation
and
then
check
with
electronic
circuit
simulator
from
http://www.falstad.com/circuit/. You must copy and paste the screenshot of the simulated
circuit, highlight the results, AND copy and paste the link using File\ExportAsLink.
3 last digits of your matric card
number
𝑥𝑥
Figure 1
2. Consider the circuit in Figure 2. An ammeter with internal resistance 𝑅𝑅𝑖𝑖 is inserted to measure
𝐼𝐼0 . Determine the reading of the ammeter if:
(a) 𝑅𝑅𝑖𝑖 = (𝑡𝑡ℎ𝑟𝑟𝑟𝑟𝑟𝑟 𝑙𝑙𝑙𝑙𝑙𝑙𝑙𝑙 𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑 𝑜𝑜𝑜𝑜 𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦 𝑚𝑚𝑚𝑚𝑚𝑚𝑚𝑚𝑚𝑚𝑚𝑚 𝑐𝑐𝑐𝑐𝑐𝑐𝑐𝑐) Ω,
(b) 𝑅𝑅𝑖𝑖 = 0 Ω.
(Hint: Find the Thevenin equivalent circuit at terminals a-b by manual calculation and then
check with electronic circuit simulator from http://www.falstad.com/circuit/ website). You
must copy and paste the screenshot of the simulated circuit, highlight the results, AND copy
and paste the link using File\ExportAsLink.
3 last digits of your matric card
number
𝑥𝑥
Figure 2
3. Obtain the Thevenin/Norton equivalent circuits at terminals a-b of the circuit in Figure 3 using
manual calculation and then check with electronic circuit simulator from
3
http://www.falstad.com/circuit/ website. You must copy and paste the screenshot of the
simulated circuit, highlight the results, AND copy and paste the link using File\ExportAsLink.
3 last digits of your matric card
number
𝑥𝑥
Figure 3
4. For the circuit in Figure 3, what resistor connected across terminals will absorb maximum
power from the circuit? What is that power? Use manual calculation and then check with
electronic circuit simulator from http://www.falstad.com/circuit/ website by replacing 𝑅𝑅𝐿𝐿𝐿𝐿𝐿𝐿𝐿𝐿
with various continuous values and sketch the resulting power to show from the sketch that
the maximum power is according to your calculation. You must copy and paste the screenshot
of the simulated circuit, highlight the results, AND copy and paste the link using
File\ExportAsLink.
Assessment Rubric:
No answer or wrong answer get 0 marks. Quarter marks (.25 increment) can be given for incomplete and imperfect
answer on each level.
Criterion
Use systematic
approach to
analyse a circuit
using …
Q1. Superposition
theorem
Q2. Thevenin
theorem
Q3.
Thevenin/Norton
theorems
Q4. Maximum
power transfer
theorems
Beginning
1
Demonstrate the
application of the
theorems in the
circuit analysis.
Developing
1.5
Demonstrate the
application of the
theorems in the
circuit analysis.
Provide explanation
on the steps.
Accomplished
2.0
Demonstrate the
application of the
theorems in the
circuit analysis.
Provide explanation
on the steps, relating
to the fundamentals
and first principles.
.. as above
Exemplary
2.5
Demonstrate the
application of the
theorems in the
circuit analysis.
Provide explanation
on the steps, relating
to the fundamentals
and first principles, as
well as verifying with
circuit analysis
software.
.. as above
.. as above
.. as above
.. as above
____/2.5
.. as above
.. as above
.. as above
____/2.5
.. as above
.. as above
.. as above
.. as above
____/2.5
.. as above
.. as above
.. as above
.. as above
TOTAL
Marks
____/2.5
/10
4
About assignment 2:
This assignment is worth 10 marks of the total final marks. Spend approximate 150 minutes i.e. 30
minutes answering time with 120 minutes study or preparation time*
LO3 Analyze DC an AC circuits using Superposition, Thevenin, Norton and Maximum Power Transfer
Theorems. (PO2, WK3,WP1)
According to EAC programme standard:
WP1 – Depth of knowledge - Cannot be resolved without in-depth engineering knowledge at the level of one or more of
WK3, WK4, WK5, WK6 or WK8 which allows a fundamental-based, first principles analytical approach.
WK3 - A systematic, theory-based formulation of engineering fundamentals required in the engineering discipline.
*Based on SLT UTeM guideline: 10 marks X 3 credit = 30 minutes, and rule of thumb, 4 X 30 minutes = 120 minutes
assignment study time.
5