1. Electricity
Chapter 16

2. Warm-up Today we are going to do a KWL chart about electricity.
K stands for Knowledge. In this column write down anything you know about electricity
W stands for what you want to learn about electricity
L stands for what you have learned about electricity (we will fill this out at the end of class)

3. Electric Charge and Force
Why would rubbing a balloon and then sticking it in someone’s hair cause the balloon to stick to the hair?
Electric Charge- an electrical property of matter that creates electric and magnetic forces and interactions

4. Like Charges Repel
There are two types of particles that effect electricity. Protons and electrons
Protons are positive
Electrons are negative
When two particles of the same charge come together they are forced away from each other which is called repel.

5. Opposite Charges Attract
Particles that are different charges will attract each other.
Do you think that electrons can turn into protons?

6. Measuring Electric Charge
SI Unit Coulomb
Electrons charge: 1.6 x 10 ^ -19 C
Protons charge: -1.6 x 10 ^ -19 C

7. Electrical Conductors and Insulators
Electrical conductor: Materials in which electrons can flow easily.
Ex- copper or gold
Electrical insulator: Material in which charges can not move freely
Ex- plastic or rubber

8. Conductors
Objects have electrical charges when they either lose or gain electrons.
The entire object does not always have an electrical charge because it may not lose or gain electrons
Induced charges- electrical charges only exist when the slightly negative object is near the slightly positive object

9. Charging items by friction
Occurs when two neutrally charged objects rub together.
One loses electrons- positively charged
One gains electrons- negatively charged
Stick together due to static electricity

10. Electric Force
A force that a charged object experiences when it interacts with other charge objects
The electric force between two charged objects depends on the amount of charge each object has and the distance between the object

11. Electric Fields Electric force is a field force
Electric field- the space around a charged object that will produce an electric force on another charged object that moves into the space
Described through drawings not by what we see

12. Positive Charged Objects

13. Negatively Charged Objects

14. Rules for drawing electric field diagrams
Electric field lines can never cross one another
Electric field lines point in the direction a positive charge would move

15. Try Drawing these diagrams
Two positively charged objects
One negatively charged object with a positively charged object that is larger than the negatively charged one
Two positively charged objects touching a negatively charge object