TTEC ONLINE LEARNING 2020

Timaru Technology Education Centre

Electronics & Control Technology

Mr Rainey Week 1 & 2

During the Level 4 lockdown initiated by NZ Government, staff at TTEC are keen for our students to continue with their

Technology learning even though they are at home.

We hope to provide you with activities and challenges you can engage with in the comfort of your own home, that will be

challenging, stimulating and fun.

We look forward to teaching you all once again, when this is all over.

Take care, be safe, be kind, be tolerant and follow guides set by the Government and all will be well.

See you at TTEC soon hopefully.

TTEC Staff

The Challenge (Design Brief) The Links Resources

Apply Ohms Law to calculate

unknown values and better

understand component and circuit

function.

This link explains Ohms Law. You

can view this before or after the

task below. I would do it

after...your choice.

https://mail.google.com/mail/

u/0/?tab=rm&ogbl#inbox/

QgrcJHsbdwdklcffzgxPZkJhFF-

CCqDNCPRB?projector=1

Pencil/pen, paper, calculator (you will have one on your phone

and computer), computer, internet access and 20—30 minutes

concentration.

Unit Overview

This is a re-cap for Year 8 students and Year 7 group who attended TTEC for Electronics term 1 and 2019 and an introduction to

Electronics for Year 7 students or Year 8 students who have not yet attended Electronics at TTEC. We will be covering the basic

components used when we Investigate Electronics, Investigate basic circuits, looking at the theory involved, understanding how com-

ponents relate to each other, the effect of changes in components and their value on a circuit function and some

Math to verify function.

We will be utilising some online software that will enable you to work at your own pace and provide a good visual representation of

circuit function. There will also be some YouTube clips to watch which reinforce all the above.

Let’s get started with some Math first… behave, it’s only numbers!

Ohms Law background and principles (Investigation)

First of all who was Ohm? - Georg Simon Ohm (16 March 1789 - 6 July 1854) was a German physicist and mathematician. During part

of the time in his life, Ohm worked as a school teacher. Some of his research focused on the new electrochemical cell, invented by

Italian scientist Alessandro Volta. Georg Simon Ohm discovered the law, named after him, which states that the current flow through a

conductor is directly proportional to the potential difference (voltage) and inversely proportional to the resistance.

Well that’s pretty straight forward eh?

Don’t worry it will all become clear as you work through this. Here is all you need to know to start with.

If you know the Amps (I)

and the Resistance (R).

Multiply I x R to find

Voltage (V)

If you know the Volts (V)

and the Resistance (R).

Divide V ÷ R to find the

Amps (I)

If you know the Volts( V)

and the Amps (I). Divide

V ÷ I to find the

Resistance (R)

Pretty straightforward now eh...

TTEC ONLINE LEARNING 2020

This is a Series Circuit

Your mission should you accept it is “Investigating Ohms Law” (Lockdown is not affecting me)

In the tables below we will have one value that will stay constant (if you don’t know what that word

means Google it), another value we will change and the other value will be the one that is unknown to

us but by applying Ohms Law we will calculate the exact value of that unknown.

You will also be required to compare and contrast the values to make a conclusion as to why the

unknown values change (if they do) and if there is a relationship to the change.

You will get it...trust me it’s not rocket science...we will do that later.

As always, copy tables, tasks onto paper or create a google document etc and save.

Some background

“stuff” you need to

know.

There is more to

know but we can

cover that at a

later date.

So what do you know about Ohms Law now? Click on the link below to test yourself...good luck

https://www.ducksters.com/science/quiz/ohms_law_questions.php

Research Unit Circuit Symbol Looks like

Wire

Battery Cell

(1.5V)

Volts

Battery more

than one cell

Volts

Resistor UK Ohms

Resistor USA Ohms

Investigation Changes Stays the same Calculate (Refer To previous Page for Formula). Conclusion?

Voltage (V) Resistance Ohms (Ω) Current Amps (I)

Original value 12 3 ohms (Ω)

Doubled 24 3 ohms (Ω)

Doubled again 48 3 ohms (Ω)

½ Original value 6 3 ohms (Ω)

¼ Original value 3 3 ohms (Ω)

Investigation Changes Stays the same Calculate (Refer To previous Page for Formula). Conclusion?

Current Amps (I) Voltage (V) Resistance Ohms (Ω)

Original value 5 100V

Doubled 10 100V

Doubled again 20 100V

½ Original value 2.5 100V

¼ Original value 1.25 100V

Investigation Changes Stays the same Calculate (Refer To previous Page for Formula). Conclusion?

Resistance Ohms (Ω) Current Amps (I) Voltage (V)

Original value 100 ohms (Ω) 2A

Doubled 200 ohms (Ω) 2A

Doubled again 400 ohms (Ω) 2A

½ Original value 50 ohms (Ω) 2A

¼ Original value 25 ohms (Ω) 2A

A series circuit consists of a single pathway through which electricity can flow. All of the parts of a series circuit—power source, wires, and devices—are connected along the same pathway; the devices are connected one after another, with no branches. Current moves through one device, then the next, and so on.

TTEC ONLINE LEARNING 2020

Conundrums For The Day Funny video for the day

It lies behind rocks and rills, and under mountains and hills. It cannot

be seen or felt, nor even heard or smelt. What is it?

I am taken from a mine, and shut up in a wooden case from which I’m

never released, and yet I am used by many. What am I?

https://www.youtube.com/watch?v=v7xdxFWPopA

Teacher contact Teacher Image

hrainey@ttec.school.nz

Please feel free to email with any questions

regarding project.

If you got this far …

well done you!

Last set of tasks. Investigation

The following links will take you to YouTube where you will get an explanation of some of the content

we have covered here and more.

I would suggest you watch one video clip, have a break let it sink in then watch another, even the

next day would be fine.

Don’t worry if you don’t understand it all the first time...it will gradually make sense.

https://www.youtube.com/watch?v=HsLLq6Rm5tU

https://www.youtube.com/watch?v=8Posj4WMo0o

https://www.youtube.com/watch?v=w82aSjLuD_8

Investigation To Do

1 http://resources.schoolscience.co.uk/BritishEnergy/11-14/index.html Click on Circuit Challenges for each page.

2 http://resources.schoolscience.co.uk/BritishEnergy/11-14/circh1pg1.html Click on Circuit Challenges for each page.

3 http://resources.schoolscience.co.uk/BritishEnergy/11-14/circh1pg2.html Click on Circuit Challenges for each page.

4 http://resources.schoolscience.co.uk/BritishEnergy/11-14/circh1pg3.html Click on Circuit Challenges for each page.

5 http://resources.schoolscience.co.uk/BritishEnergy/11-14/circh1pg4.html Click on Circuit Challenges for each page.

6 http://resources.schoolscience.co.uk/BritishEnergy/11-14/circh2pg1.html Click on Circuit Challenges for each page.

7 http://resources.schoolscience.co.uk/BritishEnergy/11-14/circh2pg2.html Click on Circuit Challenges for each page.

8 http://resources.schoolscience.co.uk/BritishEnergy/11-14/circh3pg1.html Build and Test

Take a note of how you did on tests

Nearly done ...for now. In the table below there are various links (follow them in sequence please) that take you to online interactive

Electronic Circuits you can build and test, then...you can test your knowledge via quizzes.

Quick tip...you may have to enable Flash for animations to work on this site. To do this follow the instructions below.

Then reload the

page...done!

Right Click on not secure Right Click drop down arrow Right Click allow...then X