1. 18.1 Electric Charge and Static Electricity

3. Electric Charge Electric Charge
The property of matter that gives it the ability to attract and repel other matter.
Atoms have positive charges (protons)
Atoms have negative charges (electrons)
If an atom gains or loses electrons it becomes electrically charged

4. Electric Charge
The Atom

5. Electric Forces Electric Forces
Electric Force are the attraction and repulsion of electric charges
Law of Electrostatics
Like charges repel
Opposite charges attract
The strength of electric forces depends on the strength of the electric charges

6. Electric Fields Electric Fields
Electric Fields are the space around the charge particle that it can affect.
An electric fields strength is dependent on two things:
Strength of the charge
Distance from the charge

7. Static Electricity Static Electricity
Static Electricity is the study of the behavior of electric charges, including how charges are transferred between objects.
When walking across carpet with socks on your body collects negative charges
Touching another object like a doorknob or your friend causes negative charge (electrons) to “jump” to the positive object

8. Static Electricity

9. Transferring Charges Three ways to transfer a charge: Friction
Conduction (Direct Contact)
Induction

10. Transferring Charges
Friction Charge transferred by objects rubbing together Example Rubbing a balloon on your hair

11. Transferring Charges
Conduction Charge transferred by direct contact Example A metal rod touching a charged object

12. Transferring Charges
Induction Charge transferred from a distance Example Charged hand near a doorknob

13. Transferring Charges

14. 18.1 Assessment Question #1 How is a net electric charge produced?
An excess or shortage of electrons produces a net electrical charge.
Question #2
What determines whether charges attract or repel?
Like charges will repel
Opposite charges will attract

15. 18.1 Assessment
Question #3
Name two factors that affect the strength of an electric field.
Net Charge
Distance from the charge
Question #4
List three methods of charge transfer.
Friction
Conduction (Direct Contact)
Induction

16. 18.1 Assessment Question #5 What is the Law of Electrostatics?
Like charges repel and like