physics ch 19 vocab

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field model

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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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