1. ELECTRIC FIELDS

2. Protons Mass 1.673 x 10 -27 kilograms Charge + 1.6 x 10 -19 Coulombs Electrons Mass 9.11 x 10 -31 kilograms Charge -1.6 x 10 -19 Coulombs Neutrons Mass 1.675 x 10 -27 kilograms Charge Zero zilcho none

3.  The MAGNITUDE of the charge on a proton is exactly equal to the MAGNITUDE of charge on the electron  The difference being that the proton is positive and the electron negative  The mass of a neutron is only slightly larger than the mass of a proton  The mass of an electron is MUCH smaller than the mass of either a proton or neutron

4.  Neutral  Equal amount of + and - charges

5.  Take the inverse of 1.6 x 10 -19 Coulombs per electron and it gives you….  (1.6 x 10 -19 Coulombs/electron) -1  6.25 X 10 18 electrons per coulomb of charge  It takes a lot of electrons (or protons) to add up to One Coulomb of charge

6. There are three ways to Give something a charge: 1.) Friction 2.) Conduction 3.) Induce a charge separation Law of Conservation of Charge always obeyed

7.  During any process, the net electric charge of an isolated system remains the same is conserved  Kind of like you won’t have more clothes to take out of the dryer than you put in. (Conservation of Laundry Law)

8.  You know the next part of the story  Like charges repel  Opposite charges attract  A charged particle of either sign will attract a neutral object in which a charge separtion has been induced

9. This diagram shows the process of Charging by CONDUCTION. When you touch a charged object Of either sign to an insulted Conductor, the conductor will Become charged with the same Sign as the object that touches it. In this case electrons on the rod Run off onto the conductor, over Which they spread easily. If instead a positive rod had Touched the conductor, electrons Would have run off the conductor Leaving the conductor with a Deficiency of electrons- or a Net Positive Charge.

10. CHARGING BY INDUCTION

11. THE Lower Case q Represents Charge

12.  What are some everyday experiences that relate to static, or stationary electron, electricity?

13.  Did large numbers of experiments to determine what affects the force that acts between any two charged objects.  He found that the force is directly proportional to the product of the charged  He found that the force is also inversely proportional to the distance between them squared…..(very similar to Universal Law of Gravitation discovered by Isaac Newton about 100 year before this)

14. Coulomb’s Law F= (kq 1 q 2 )/d 2

15.  The k constant in Coulomb’s law is so…. Much larger than the G constant in the Universal law of gravitation accounting for the fact that a small amount of charge can exert a LOT more force than a small amount of mass  The k constant is 9 x 10 9 (N-m 2 )/C 2  Of course force is measured in Newtons!!!

16. Like All forces The forces That charges Exert on one Another are Subject to Vectors and All that Implies!!!