2 Basic Concept In Mechanics, the basic property of matter is Mass. In Electricity, the basic property is Charge.
3 Basic Units Compare Smallest Possible Unit Practical Unit US Currency Penny$0.01 = 1/100th of a dollarDollar$1 = 100 PenniesElectricChargeElementary Charge (1e)electron or proton1e = 1.6 x 10-19CCoulomb1C = 6.25 x 1018e
4 ExamplesHow many electrons are on a conductor if it has a charge of -4 x C?250 electronsWhat charge will 120 protons have?1.92 x C
5 ExampleWhy is it not possible for any object to have a charge of 8 x C?Electrons (or protons) cannot be broken down into smaller pieces.
6 Movement of Charge Conductors Insulators Electrons are free to move Most metalsInsulatorsElectrons are not free to move
17 Electric FieldsElectric Field is a region around a charged object through which a force is exerted on any other charged particle.Electric Field Lines are imaginary lines drawn to show electric field
18 - Electric Field Lines + Lines are not real Positive Negative Can not crossCloser lines mean stronger field-+
19 Electric Fields Parallel Plates Electric Field is uniform between plates
20 Electric Field Strength, E Force per chargeAmount of force felt by a chargeVectorE (N/C)Fe (N)q (C)