1. ELECTRICITY What would life be like without electricity? List 4 things that you would miss the most: 1) ______________________________ 2) ______________________________ 3) ______________________________ 4) ______________________________

2. Electricity: Electrical Current

3. Electricity Static Static Is stationary Is stationary E.g. Brush your hair Wool socks in tumble drier Current Current Flows around circuit Flows around circuit E.g. turn on light Walkman Electricity occurs in 2 different forms

4. Electrical Charge

5. Review: What is inside the atom? The atom is made of 3 kinds of particles. The atom is made of 3 kinds of particles. The electron The electron The proton The proton The neutron The neutron

6. Electric fields surround every charge and can act upon other objects (even without touching them) The force created by this field can either attract or repel

7. Electric Charge There are two types of charge: positive and negative. There are two types of charge: positive and negative. Like charges repel. Like charges repel. Unlike charges attract. Unlike charges attract. Charge is never created or destroyed. Charge is never created or destroyed. Charge is formed because a transfer of electrons. Charge is formed because a transfer of electrons.

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11. Charged Objects + + + - + + + - + - + - + - - - + - Neutral Object Negatively Charged Object Positively Charged Object

12. How Do They Become Charged? Contact Contact Electrons get passed from one object to the other when they touch Induction Induction Electrons in the object move away or towards another charged object is placed close to it

14. Friction

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21. What happens when you rub a balloon on your head and put it against the wall?

22. Static electricity occurs when electrons transfer to your clothes or hair and give them a charge. When you touch something, the charge is released, causing a "jolt" How do you think this machine affects the hair on these girls? Static Electricity

23. How are static charges detected?

24. When Lightning Strikes!!!

25. Lightning

26. What causes lightning? Lightning is actually just static electricity on a much larger scale. Lightning is actually just static electricity on a much larger scale. The rubbing is caused by air moving around The rubbing is caused by air moving around In thunderclouds bottom is usually negative and top is positive. In thunderclouds bottom is usually negative and top is positive.

29. Uses of Static Electricity Spraying a Car Positive Car Negative Spraygun The paint spreads out as each negative drop repels No paint is wasted as the positive car attracts the negative paint

30. Removing Smoke from Power Station Chimneys Positive Plate Negative Plate Charge up the Smoke No smoke leaves the chimney

31. Earthing Petrol Tankers Petrol rubbing against the pipe can build up a static charge which could cause an explosion The tanker is joined to the ground with a wire to stop a charge building up

32. Insulators and Conductors Insulators don’t let electrons flow through them Insulators don’t let electrons flow through them Conductors let electrons flow through them Conductors let electrons flow through them Electrons stay stuck on the surface and don’t move— That’s STATIC ELECTRICITY!