physics ch 19 vocab

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

Electric field

The region surrounding a charge object in which it can exert and electrical force

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

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

Electric field strength (E)

The direction and magnitude of the electric field at a point in space

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

Potential difference (△v)

The difference of electrical potential between two locations in a circuit or in space

Volt (v)

The derived SI unit used to measure electrical potential and potential difference; lV=1 J/C

Equipotential surface

Imaginary surface in a magical field I wish the electrical potential is the same at all points

Leyden jar

And early compacitor

Capacitor

A simple electrical device that is used to storage charge

Plate

One of the conductors in a capacitor the anode in a vacuum tube

dielectric

the insulator between the plates of a capacitor

dielectric constant (k)

The ratio of electric field strength in a vacuum to the same field, passing through a particular material

capacitance (c)

the amount of charge per volt of potential difference that a capacitor can store; measured in farads

permittivity of free space

A measure of how effectively an electric field penetrates a vacuum

Farad (F)

The derived SI unit of capacitance; 1F=1C/V

Electrical components

Any device that is used in electrical circuit

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

Conductor

Immaterial, consisting of particles with loosely held electrons that allows the easy transmission of thermal energy or electricity