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UEE22011 Electrotechnology

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UEE22011 Electrotechnology

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UEE22011 Electrotechnology

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Course Code: UEE22011
University: Tafe NSW

MyAssignmentHelp.com is not sponsored or endorsed by this college or university

Country: Australia

Question:

This assessment has been designed to allow you to provide evidence of your competence in the unit UEENEEE104A Solve problems in d.c. circuits .
In completing your final assessments, you will show evidence of your ability to:

Prepare to work on d.c. electrical circuits
Solve dc circuit problems
Complete work and document problem solving activities.

You can create your video using your mobile device or your laptop. You can set it up yourself or ask a friend or colleague to do the video recording for you. The video is to be only 3 minutes in length.
You may have to turn off the video camera from time to time.
Make sure you:

do a practice run and time yourself before you start
check the audio before you start recording
remember to introduce yourself, and the topic of your video, at the beginning of your video recording. For this part of the assessment, you use your Electronic Playground and follow a procedure to build a basic electrical circuit. You will need to video this process.

In this video (maximum of 3 minutes), you will be explaining to your assessor the process you followed to do this.
The checklist below is what your assessor will use to evaluate your video. Use the checklist as a guide to what you will need to include in the video.
1.Follow the circuit and wiring diagrams accurately
2.Include the multimeter in the circuit as indicated in the procedure
3.Use wires of appropriate length/colour
4.Follow appropriate WHS procedures
5.Show an understanding of circuit interpretation
1.Is the quality (sound and visuals) of the presentation appropriate?
2.Have you used appropriate language and terminology for the task?
3.Have you provided sufficient information in the three-minute video?
1.Set the multimeter to Ohms range.
2.Check the zero reading of the multimeter by shorting the leads together.  Make a record of this value. You will need to deduct it from your readings later.
3.Use the multimeter to measure the resistance of the 470 Ω resistor.  Make sure your fingers do not contact the resistor or leads while doing this.

Answer:

Measurement of Resistance (R1):
Set the multimeter to ohms range in which 470 ohms lies and rotate the knob. It is possible that it has some error. It can be checked connecting the two leads together. If any resistance (Rouse, 2015) is found then it has to be deducted from the final reading. Now, connect the lead marked ‘V ohms mA’ of the multimeter to ’38’ of the electronic playground (one end of 470 ohms resistor) and the lead marked ‘COM’ to ’39’ of the electronic playground (other end of 470 ohms resistor) without touching the fingers as shown . Note the reading as R1. Note that if the error reading was found earlier it has to be deducted from R1 to get resultant R1.
Measurement of Current (I1):
Disconnect all the connections. In order to measure the current (Encyclopaedia Britannica, 2018) through the 470 ohms resistor we need to first set the multimeter to the minimum DC mA range. Connect the lead marked ‘V ohms mA’ of the multimeter to ’38’ (one end of 470 ohms resistor) as marked on the electronic playground. ’39’ point to ’26’ point which is the negative end of the 9V battery. ’27’ point, which is the positive end of the same battery to one end of the fuse. The other end of the fuse has to be connected to the ’56’ point which is one end of the switch. The other end ’55’ finally goes back to the ‘COM’ of the multimeter as shown in figure 2. Rotate the knob in the ampere range till any value is shown on the Liquid Crystal Display (LCD) of the multimeter. Note the value as I1 when displayed.
Measurement of Potential difference (V1):
Disconnect all the connections. In order to measure the potential difference (Electrical4u, 2018) across the 470 ohms resistor we need to first set the multimeter to the minimum DC volts range. Connect the lead marked ‘V ohms mA’ of the multimeter to ’38’ (one end of 470 ohms resistor) as marked on the electronic playground. ’39’ point to ’26’ point which is the negative end of the 9V battery as well as to the ‘COM’ of the multimeter. ’27’ point, which is the positive end of the same battery to one end of the fuse. The other end of the fuse has to be connected to the ’56’ point which is one end of the switch. The other end ’55’ finally goes back to ’38’ (one end of 470 ohms resistor) as shown in figure 3. Rotate the knob in the potential difference range till any value is shown on the Liquid Crystal Display (LCD) of the multimeter. Note the value as V1 when displayed.
Part C:
We have got all the practical values of current (I1), potential difference (V1) and resistance (R1). Now we will calculate the theoretical values.
Theoretical potential difference (V) = 9V (neglecting the voltage drop offered by the fuse and wires).
Theoretical current (I) needs to be calculated and the theoretical resistance (R) is 470 ohms (neglecting the resistance offered by the wire, fuse and multimeter).
According to Ohms law (Worcester Polytechnic Institute, 2018), Current through the resistor = Potential difference across it/ resistance
Therefore, I = V/ R
I= 9V/470 ohms= 0.019 A= 19.14 mA
In tabular form,

Resistance

ohms

Measured (R1)

Theoretical (R)

470

 

Current

mA

Measured (I1)

Theoretical (I)

19.14

 

Potential difference

volts

Measured (V1)

Theoretical (V)

9

References
Electrical4u (2018) Voltage or Electric Potential Difference [Online]. Available from: https://www.electrical4u.com/voltage-or-electric-potential-difference/ [Accessed 16 October 2018].
Encyclopaedia Britannica (2018) Electric current [Online]. Available from: https://www.britannica.com/science/electric-current [Accessed 16 October 2018].
Rouse, M. (2015). Resistance. [Online]. Available from: https://whatis.techtarget.com/definition/resistance [Accessed 16 October 2018].
Worcester Polytechnic Institute (2018) Hands-on Activity: Ohm’s Law I [Online]. Available from: https://www.teachengineering.org/activities/view/ohm1_act_joy [Accessed 16 October 2018].

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