Gr 10 - Physics - Lesson 2-Static electricity-charges.pptx

PPT- Static electricity- IGCSE

1. Thought of the day WELLBEING CHECK : Date: Topic: Static Electricity

2. Title: Static Electricity Learning Objective – We are learning to ; - Understand static electricity in terms of imbalance of charges. Date: Topic: Static Electricity

3. Starter What does the diagram represent? Label the diagram. What can you say about the charges of the particles? Date: Topic: Static Electricity Lesson Objectives: Understand static electricity in terms of imbalance of charges.

4. This is an atom of gold, although the nucleus (protons and neutrons) are not shown. How can you compare the behaviour of electrons which are closer and further away from the nucleus? Static Electricity The electrons closest to the nucleus experience a much stronger ‘pull force’ from the protons – just like a magnet. Electrons further away are bound loosely and experience less pull force than the first shell electrons. This means that the outer electrons CAN be attracted away from the atom. Lesson Objectives: Understand static electricity in terms of imbalance of charges. Date: Topic: Static Electricity

5. How do we make static electricity? . Static electricity is made when electrons are transferred from one material to another. This creates two opposite charged materials. Positive charge (+) Negative charge (-) Like charges repel; unlike charges attract. Do you recall a similar statement ? Lesson Objectives: Understand static electricity in terms of imbalance of charges. Date: Topic: Static Electricity

6. Static Electricity Static electricity is all about charges which are not free to move. As a result they build up in one place, resulting in a spark or shock when they do move. + + + + + + - - - - - - Perspex Polythene Insulating materials, such as polythene and perspex , can be charged by rubbing them with a dry woollen cloth Task-1: Referring to the figure write the answer of the following questions. Q 1. What happened when the Perspex and the Polythene rods are rubbed? Q 2. What happens when you rub two insulator materials? Topic: Static Electricity Lesson Objectives: Understand static electricity in terms of imbalance of charges.

7. Only electrons move, never the positive charges! + + + + + + Perspex - - - - - - - Electrons move from the rod onto the duster . The rod becomes positively charged , and the duster becomes negatively charged. Task 2: Observe the difference when the two rods are rubbed with the cloth and write the points in your notebook. Lesson Objectives: Understand static electricity in terms of imbalance of charges. Date: Topic: Static Electricity

8. Only electrons move, never the positive charges! - - - - - - Polythene + + + + + + + Electrons move from the duster onto the rod . The rod becomes negatively charged , and the duster becomes positively charged. Task 2: Observe the difference when the two rods are rubbed with the cloth and write the points in your notebook. Date: Topic: Static Electricity Lesson Objectives: Understand static electricity in terms of imbalance of charges.

9. Let’s watch this video to have a better understanding of your Task 2. Date: Topic: Static Electricity Lesson Objectives: Understand static electricity in terms of imbalance of charges.

10. Real life application-Uses of Static Electricity 1. Electrostatic smoke precipitators . + + + + + + - - - - - - As particles of smoke or dust rise up the chimney they are attracted to the charged plates on either side. 2. Spray painting + + + _ _ _ The spray nozzle is connected to a positive terminal . Each spray drop is now + ve . The drops repel and spread out . The car is connected to the earth (or – ve ). + ve drops attracted to the – ve car. 3. Photocopiers make use of static to attract black toner to the paper. Date: Topic: Static Electricity Lesson Objectives: Compare the properties of two types of charges.

11. Danger of Static Electricity A tall building is protected by a lightning conductor consisting of a thick copper strip fixed on the outside of the building connecting metal spikes at the top to a metal plate in the ground 1. Lightning . Date: Topic: Static Electricity Lesson Objectives: Understand static electricity in terms of imbalance of charges. Extension work: Explain in words how does clouds get charged and why does lightening happens?

12. Plenary: Exam-style question Date: Topic: Static Electricity Lesson Objectives: Understand static electricity in terms of imbalance of charges.

13. Plenary: Exam-style question Date: Topic: Static Electricity Lesson Objectives: Understand static electricity in terms of imbalance of charges.

14. I can I am not clear on this I am a bit confused and need more help​ ​ I can do the tasks confidently​ ​ Describe the basic concept of static electricity. Understand the transfer of charges during rubbing of two insulating materials. Describe the uses and dangers of static electricity. Learning outcomes: have we achieved the learning objectives?

15. Home Assignment: 1. 2. Date: Topic: Static Electricity Lesson Objectives: Understand static electricity in terms of imbalance of charges.