THE 255 Quiz 3

circuit

a conductive path through which electricity flows

series circuit

A circuit in which all parts are connected end to end to provide a single path of current.

parallel circuit

A circuit that contains more than one path for current flow.

combination circuit

a circuit with both series and parallel components, ex)light switch

conductor

A material that allows heat and electricity to pass through it ex)copper, people

insulator

A material that does not allow heat or electricity to move through it easily, ex)tugstein

watt

unit of power, how much work something can do

voltage

the unit of measurement for electrical potential

ampere (AMP)

unit of measurement of electrical current

ohm

unit of electrical resistance

ohm's law

as voltage increases current increases and as resistance increases current decreases

as voltage increases current increases and as resistance increases current decreases

ohm's law

hot wire

In electrical circuits, the one that carries the electrical current.

neutral wire

a wire that carries current away from the component; it is coated in white plastic

ground wire

connects circuits in the home to the earth, giving charges alternate path in case of a short circuit, is non colored or green

short circuit

when too much current flows through something that was not rated to handle that much current

fuse

A safety device with a thin metal strip that will melt if too much current passes through a circuit

circuit breaker

A reusable safety switch that breaks the circuit when the current becomes too high

direct current

an electric current that flows in one direction only, ex) cars

alternating current

an electric current that reverses its direction many times a second at regular intervals ex)your toaster

incandescent

An electric lamp in which a filament is heated by an electrical current & emitting light.

base, bulb, filament, gas

parts of incandescent light

LED

Light Emitting Diode

gaseous discharge

how fluorescent lights work, the gas inside produces the light

filament

the string thing on the inside, commonly made with tungsten

tungsten

filament material?

Filament, light

In a lightbulb, the ___________________ converts electrical energy into heat and __________________.

bulb

glass part

base

metal part

size and type

what do the two words describing light bases mean

edison plug

twist lock plug

grounded stage pin

W=VA

1. check attachment
1.5 close shutters
2. safety cable
3. hang light
4. open shutters
5. plug in

steps to hang a light

black

hot wire color

white or gray

neutral wire color

none or green

ground wire color

scoop

PAR can

parabolic aluminized reflector lamps

PAR can

fresnel

ERS

ERS

a source four is a...

ellipsoidal reflector spotlight

ERS

ERS

a six by nine is a...

plano-convex lens

a lens with one flat and one outward-curving face

inert gas

(also, noble gas) element with filled outer electron shell that is unreactive with other atoms, in light bulbs

shutter

a device that opens and closes the opening for light in an lighting instrument (the 4 stick things coming off the of the light)

yoke

the "n" on top of the lighting instrument

strip light

cyc light

follow spot

dimmer

an electrical device that controls the intensity of a light source connected to it

w=4800; w=va

if you have 40 amp and 120 volts, what's the watts?

a=83; w/v=a

if you have 120 volts and 10,000 watts, what's the amps?

166 volts, w/a=v

if you have 5000 watts and 30 amps what's the volts?

additive

LED's have which type of color mixing?

subtractive

using gels is which type of color mixing?

the gel are subtractive, but the different lights together are additive

using gels (red, green, blue) with incandescent bulbs on a strip light to achieve a white light is which color mixing?