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RAD 156 Week 3

Part 2

QuestionAnswer
Stationary Electric Charges- Electrostatics
Electrodynamics Describe- Charges in Motion
Electrical Charges are measured in? Coulombs
Electron charge is used because electricity most often results from? The Movement of Electrons
_______ is the behavior of electric charges, usually considered the motion/flow of electrons Electricity
Materials that have a very large number of free electrons Conductors
Materials that have very few available free electrons Insulator
What are some examples of Insulators? Glass, Plastic, Rubber
What are some examples of Conductors? Copper, Aluminum, Silver
Coulomb’s Law: The electrostatic force between two charges is __________ to the product of their quantities Directly Proportional
Coulomb’s Law: The electrostatic force between two charges is __________ to the square of the distance between them Inversely Proportional
The electrostatic force between two charges_________ when the amount of charge increases Increases
The electrostatic force between two charges _________ as the distance between the charges increases Decreases Rapidly
Electric charges reside only on the _________ of solid conductors External Surface
Electrons concentrate on the- Sharpest Curve & Roughest Surface
The concentration of charges on a curved surface of a conductor is greatest where the _______ is greatest Curvature
Only _________ are free to move in solid conductors Negative Charges (electrons)
Electrons move from areas of _______ concentration Highest to Lowest
Process of charging an object by Adding or Subtracting Electrons Electrification
Friction Electrification Example Balloon Against Hair Socks Against Carpet
Contact (conduction) Electrification Example Electric shock from touching doorknob (after scuffing feet on carpet)
Induction Electrification Example Negatively charged rod and metal sphere
X-ray tubes are an example of Induction Electrification
The study of moving electric charges Electrodynamics
What are some examples of Semiconductors? Silicon & Germanium
What are some examples of Superconductors? Niobium & Titanium in MRI units
What is the most common electrical conductor? Copper
Charging by rubbing different materials together Friction
Charging of neutral objects by contact with an already charged object Conduction
Charging of neutral objects without contact of other charged objects Induction
Created by: user-2016295
 

 



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