physics ch 19 vocab

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Physics

12th

20 Terms

1
field model
A theoretical approach to accurately explaining such three dimensional phenomenon as magnetic electric and gravitational forces, as well as sound propagation and subatomic particles fluxes
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2
Electric field
The region surrounding a charge object in which it can exert and electrical force
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3
Line of force
One of a number of imaginary lines, defining the direction and intensity of the force exerted by the field, at all points surrounding an electric charge or magnet
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4
Test charge
A positive charge small enough that it does not disort an electric field, and that is used to determine the direction of the electric field vector
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5
Electric field strength (E)
The direction and magnitude of the electric field at a point in space
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6
Electrical potential (V)
The amount of work per unit charge that is needed to prove a charge a certain distance from a point charge; V=Uelq
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7
Potential difference (△v)
The difference of electrical potential between two locations in a circuit or in space
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8
Volt (v)
The derived SI unit used to measure electrical potential and potential difference; lV=1 J/C
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9
Equipotential surface
Imaginary surface in a magical field I wish the electrical potential is the same at all points
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10
Leyden jar
And early compacitor
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11
Capacitor
A simple electrical device that is used to storage charge
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12
Plate
One of the conductors in a capacitor the anode in a vacuum tube
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13
dielectric
the insulator between the plates of a capacitor
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14
dielectric constant (k)
The ratio of electric field strength in a vacuum to the same field, passing through a particular material
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15
capacitance (c)
the amount of charge per volt of potential difference that a capacitor can store; measured in farads
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16
permittivity of free space
A measure of how effectively an electric field penetrates a vacuum
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17
Farad (F)
The derived SI unit of capacitance; 1F=1C/V
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18
Electrical components
Any device that is used in electrical circuit
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19
permittivity of material (ε)
A measure of the ability of a dielectric material between the plates of a capacitor to resist the formation of an electric field within it
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20
Conductor
Immaterial, consisting of particles with loosely held electrons that allows the easy transmission of thermal energy or electricity
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