# Ohms law and resistors

Introduction

https://upload.wikimedia.org/wikipedia/commons/thumb/2/2a/Georg_Simon_Ohm3.jpg/220px-Georg_Simon_Ohm3.jpg

In grade 8 you learned about Ohms law , which states that the voltage across a conductor is directly porportional to the current flowing through it, provided all physical conditions and temperature remain constant.

The statement that are being used to to express Ohms law are the mathematical formula which is R = V / I , where V is the voltage across the conductor, I is the current flowing through the conductor and R is the resistance provided by the conductor to the flow of current.

Task

https://eepower.com/uploads/education/what_is_a_resistor.jpg

In this activity you going to:

1. In short, tell us what a resistor is, the different types of resistors with their characteristics. https://eepower.com/resistor-guide/resistor-fundamentals/what-is-a-resistor/

2. Give the values of the following resistors. (Use kilo symbol where required) https://eepower.com/resistor-guide/resistor-standards-and-codes/resistor-color-code/

Brown Black Black                                                   Brown Black Brown                                                  Orange White Yellow

1. ……………………                               ii. ……………….......                              iii. ………………………

1. Calculate the values of the following circuits. (Gildenhuys, R., De Lange, M., Greenop, I. and Parkin, M., 2013. Via Afrika technology. Cape Town: Via Afrika, pp.116 - 119.)
1. Rᴛ =                                                        ii. Rᴛ = R1 + R2

 R1
 R2
 R1

100Ω

 R2

500Ω                    500Ω

100Ω

………………………………………….                                                …………………………………………

………………………………………….                                                …………………………………………

………………………………………….                                                …………………………………………

1. Design a circuit using three 10Ω resistors to give a Rᴛ of 15Ω.

Process

1. You need to go to the links provided to you and read/look at the information .

2. The links will provide you with web pages and direct you to youtube channels that have information to the question.

3. In order to answer the questions you need to open a Microsoft Word document.

4. For you to answer question 4, you will have to watch the youtube video on how to draw a circuit on Microsoft Word document. To make it easier, you can draw the the circuit first on a loose paper and then copy the drawing/circuit afterward to Microsoft Word. Make sure that all your components are on the right place - you will be penalise for it.

Evaluation
 Criteria Yes No Answered all questions Used all links and resources to answer questions Answers are thoughtful Followed instructions Interpret information correctly

Conclusion

https://cdn1.byjus.com/wp-content/uploads/2019/06/Basic-electric-circuit.png

This activity is been compile with the goal of helping and encourage learners to do more research. With the creation of links it guides learners on how to follow instructions in choosing the best and resourceful information.

The outcome for the activity is for learners to understand the concepts of Ohms law and resistors. At the end they need to differentiate between the different resistors, how to determine the values of resistors,  calculate the values of a resistor in a circuit and how to design a circuit with given resistors.

This activity is not rocket science unless you don't follow the instructions. Learners have multiple resourceful information to complete the activity. Links with web pages and youtube channels are provided - your textbook are the main source of information.

Credits

Sources:

Teacher Page

I just felt that learners don't get enough information in schools about Ohms law and resistors. Teachers rush through the topic to complete or finish their curriculum. I also understand that teachers can't stuck forever on one topic..that's why I decided why not approach the topic with another angle to make it more interesting and provide the learners with more information.

That's how I came to use Webquest. Provide them with research resources and activities. Create an online activity for them to do research about resistors and Ohms law. Give them the neccesary time to do research or provide them with links to complete the activity. At the same time to guide them on how to do research and which resources to use because not everthing on the internet are effective.

Knowing how to find useful information on the internet can just benefit them. Broader their knowledge about resistors and help them to think critical about the using of it. If they manage to pass this activity, by pass I mean understand what are required from them then they have overcome the worst.