Get connected with Ohm’s Law

1. Get connected with Ohm’s Law Jan Randewijk WCED and Nico Beute IEEE & CPUT

2. Overview • Introduction Nico 5 min • Educational issues Jan 10 min • Documents & materials Nico 5 min • Experiment Jan 40 min • Conclusion Nico 10 min

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

4. Understand the educational system • Educational terms • Curriculum • Outcomes {CO , DO & LO} • Assessment standards • Educational environment • Knowledge of learners • Knowledge of teachers

5. How • Make it practical – give examples from the workplace • Keep it simple • Try it out today

6. Educational IssuesJan Randewijk • Critical Outcomes • Developmental Outcomes • Learning Outcomes

7. Documentation and MaterialsNico • 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

8. Documents • Introduction • Curriculum framework and assessment standards • Background information for teachers • Lesson plan guidelines • Materials required • Possible extra activities • Student handout

9. Materials • Affordable • Easily obtainable • As practical as possible • Robust • Re-usable

10. Alignment to National Curriculum 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.

11. The ExperimentJan Randewijk • Continuity tester (page 19) • Ohms Law (page 21)

12. ConclusionNico

13. Practical applications of 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 • - • - • -

14. 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

15. Thank you

16. Critical 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.

17. The Developmental Outcomes 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.

18. Learning 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.

19. Link with LOs and ASs of Electrical Technology Grade 10 As 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

20. Continuity tester

21. Continuity tester

22. RESISTORS 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 The E12 series is a typical example where there are only 12 values and multiples of those 12 values in the series: 10; 12; 15; 18; 22; 27; 33; 47; 56; 68; 74; 82. With an accuracy/tolerance 20% this series will cover the full range of every possible value. 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

23. 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

24. Continuity tester