53 terms

Abeka Physics chapter 22

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F = |q1||q2| / r^2
The law of lecturing force formula
E = (k)|q| /(qo)
Formula for the strength of a field at a given distance
8.99 x 10^9
Value of k in Coulomb's law units of C, N, and M are used
8.85 x 10^-12
Value of (epsilon)o
E = F/qo
Equation an electric field
(22.1) Discharge
Sudden release of accumulated electric charge
Neutral
Any object with no electric charge is said to be ____
Static electricity
A stationary charge is called _____ _________
Law of electric charge
What law states like charges repel and unlike charges attract?
Cation
An atom that has lost (an) electron(s) is a ______
Anion
An atom that has gained (an) electron(s)
Current
What is the flow of charge from one place to another?
Conductors
An object that transmits current efficiently are _________
Silver, gold, copper, aluminum
What are the four best conductors
Electrons
Responsible for the flow of charge in a solid conductor
Delocalized
Describes the electrons of a conductor
Insulator
An object that does cannot transfer a charge
Semiconductors
Solids that are poor transmitters of current
Conduction
Flow of electrons (current) through a conductor or form one object to another
Same
Conduction results in a temporary ____ charge on the neutral body as on the charged object
Negative
An excess of electrons results in a ______ charge
Induction
The production of a local charge by the influence of a charged body at a distance
Positive
A deficiency of electrons results in a ______ charge
Ground
Wire or conductor in contact with the earth
Opposite
Induction results in a long-lasting _______ charge on the neutral object than on the charged material
Electroscope
A simple device used to test the charge of an object
Permitvity
Extent to which a medium allows an electric field to act between charges
(Epsilon)
Greek letter symbolizing Permivity
Coulomb (C)
The SI unit of charge
Law of electric force
The formula used to determine
1.602 x 10 ^-19
Value of a single proton or electron
(22.2) Electric field
One charge's influence on another charge at some distance
N / C
Unit for an electric field
Test charge
Small charge signified by qo
Stronger, weaker
The lines of force are distributed so that they are closer together where the field is _______ and farther apart where the field is ______.
Lines of force
Orderly patter regarded as a map of the rod's electric field
Tangent
The direction of a field strength is ________ to a line or force at every point
Perpendicular
The lines of force are _____________ to every charged surface
Positively, negatively
The lines of force originate in a ________ charged body and terminate in a ________ charged body
Uniform field
A field in which the field strength is the same throughout
(22.3) electric potential energy
The work done against a field to move the total charge from the ground
Electric potential
Total energy per number of coulombs
Electric potential difference
Work required of an external force to move a unit positive charge
Gradient
Sliding scale of comparison; change in the loss of potential energy
Electric potential energy
Symbolized by E
No
____ electric field remains within the body of a conductor
Surface
All charge is confined to the _______ of the conductor
Sharper; point
In the conductor is not a sphere, the charge is more concentrated whenever the contour is a _____ curve and most concentrated wherever the contour comes to a corner a _____
Corona discharge
Gradual discharge to the air producing a dull glow; also called st. Elmo's fire
N/C
Unit indicating
V/m
Unit indicating
Equipotential lines
Can be drawn through points having the same electric potential
Equipotential
The conductor must have an ________ surface