Get connected with Get connected with Ohm’s LawOhm’s Law

Jan Randewijk WCED andJan Randewijk WCED and Nico Beute IEEE & CPUT Nico Beute IEEE & CPUT

OverviewOverview

• Introduction Nico 5 min

• Educational issues Jan 10 min

• Documents & materials Nico 5 min

• Experiment Jan 40 min

• Conclusion Nico 10 min

ObjectiveObjective

• To enable engineers to lead a training session for teachers on an engineering related topic

Understand Understand the educational systemthe educational system

– Educational terms• Curriculum• Outcomes {CO , DO & LO}• Assessment standards

– Educational environment• Knowledge of learners• Knowledge of teachers

HowHow

• Make it practical – give examples from the workplace

• Keep it simple

• Try it out today

Educational IssuesEducational IssuesJan RandewijkJan Randewijk

• Critical Outcomes

• Developmental Outcomes

• Learning Outcomes

Documentation and MaterialsDocumentation and MaterialsNicoNico

• Get documents ready before presentation– The IEEE has a number of well prepared sets

• Update for South African use in consultation with your education department

– Draw up documents for scratch– Requirements:

• Must enable teacher to present lesson• Must consider the educational environment

– Affordable

– Level of knowledge of learners

– Technical knowledge of teachers

DocumentsDocuments

• Introduction• Curriculum framework and

assessment standards• Background information for teachers• Lesson plan guidelines• Materials required• Possible extra activities• Student handout

MaterialsMaterials

• Affordable

• Easily obtainable

• As practical as possible

• Robust

• Re-usable

Alignment to National Alignment to National Curriculum StatementsCurriculum Statements

• Note: All lesson Plans in this series are aligned to the Further Education and Training (FET) National Curriculum Statements (NCS) for Electrical Technology.

• National Curriculum Statement builds its Learning Outcomes for Grades 10 – 12 on the Critical and Developmental Outcomes that were inspired by the Constitution and developed through a democratic process.

The ExperimentThe ExperimentJan RandewijkJan Randewijk

• Continuity tester (page 19)

• Ohms Law (page 21)

ConclusionConclusion

NicoNico

Practical applications Practical applications of Ohm’s Lawof Ohm’s Law

• Measure resistance of kettle element and calculate power rating– Does it work for a light bulb?

• Calculate volt-drop in a conductor

• -

• -

• -

Your evaluation of this activity Your evaluation of this activity

• Documentation– does it meet educational requirements– does it give and allow for practical applications– can it be used by teachers

• clear and understandable guidelines• Usable handout for students

• Materials– affordable– robust

Thank Thank youyou

Critical OutcomesCritical Outcomes As a result of the activities, all learners should develop and

demonstrate the ability to; identify and solve problems and make decisions using critical and

creative thinking;• work effectively with others as members of a team, group,

organisation and community;• organise and manage themselves and their activities responsibly and

effectively;• collect, analyse, organise and critically evaluate information;• communicate effectively using visual, symbolic and/or language skills

in various modes;• use science and technology effectively and critically showing

responsibility towards the environment and the health of others; and• demonstrate an understanding of the world as a set of related systems

by recognising that problem solving contexts do not exist in isolation.

 

The Developmental Outcomes The Developmental Outcomes require learners to be able to:require learners to be able to:

reflect on and explore a variety of strategies to learn more effectively;

• participate as responsible citizens in the life of local, national and global communities;

• be culturally and aesthetically sensitive across a range of social contexts;

• explore education and career opportunities; and• develop entrepreneurial opportunities.

Learning OutcomesLearning Outcomes • LO1: Technology, Society and the Environment -  The

learner is able to demonstrate an awareness and understanding of the interrelationship between Technology, society and the environment.

• LO2: Technological Process - The learner is able to understand and apply the Technological process.

• LO3: Knowledge and Understanding - The learner is able to demonstrate an understanding of the concepts and principles related to Electrical Technology.

• LO4: Application of Knowledge -  The learner is able to apply principles and practices related to Electrical Technology.

Link with LOs and ASs of Link with LOs and ASs of Electrical Technology Grade 10Electrical Technology Grade 10As a result of the Get connected with Ohm’s Law activity, all learners should develop and demonstrate the ability to;present assignments by means of a variety of communication media. (10.2.5)•describe the use and care of tools and measuring instruments (10.3.2)•describe the principles of electricity (10.3.4)•identify and describe the characteristics of electronic components (10.3.6

Continuity tester

Continuity tester

         

Figure .2.2

 Value

 Colour

 1st Significant Figure

2nd Significant Figure

 Multiplier

 Tolerance

0 Black   0    

1 Brown 1 1 10 1%

2 Red 2 2 100 2%

3 Orange

3 3 1000  

4 Yellow 4 4 10000  

5 Green 5 5 100 000  

6 Blue 6 6 1000 000  

7 Violet 7 7 10 000 000  

8 Grey 8 8 100 000 000  

9 White 9 9 1000000000  

  Silver       10%

  Gold       5%

The resistor colour- code chart

Materials

IEEE Option Local Supplier

6,3 volt Lamp 150 mA 6,3 Volts 300 mA

Resistor No.1 = 47 ohms Resistor No.1 = 22 ohms

Resistor No.1 = 100 ohms Resistor No.1 = 39 ohms

Resistor No.1 = 100 ohms Resistor No.1 = 47 ohms 

Continuity tester