1. Chapter 7 Section 1: Electric Charge
Electricity
Chapter 7 Section 1:
Electric Charge

2. What’s going on here?

3. Electric Charge! Atoms have 2 kinds of charged particles in them:
Protons: positively charged, found in the nucleus
Electrons: negatively charged, found outside the nucleus
Some atoms can lose electrons easily
Lost electrons are never really lost!
Law of Conservation of Charge:
Electrons can build up on an object
Static electricity: accumulation of extra charges on an object

4. The Law of Charges Opposite charges attract Like charges repel
Why is the girl’s hair sticking out?

5. Electric Force Charges can detect other charges at a distance
As the distance increases, the electric force from a charge decreases
Electric field: the area around a charge where the charge can be detected
Field lines are drawn to show the electric field

6. Conductors and Insulators
A conductor can cause a static charge to discharge!
An insulator can keep a static charge from moving

7. Transferring Electric Charge
Charging by contact:
a charged object touches another and moves charge
contact may be friction or contact of an already charged object
Charging by induction:
electrons are rearranged by a charge that comes close

8. The Ultimate Static Electricity