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35 terms

Sci 8 Electricity Test

STUDY
PLAY
conductor
allows electricity to flow
insulator
a material that does not allow electrons to flow
circuit
a complete path of electrons
static charge
to many electrons or not enough
Ohm's Law
V=RxV
electric current
the amount of electrical flow
potentioal difference
push that drives the electrons through the circuit
electric power
P=VxI measered in watts
static discharge
When electrons jump from one thing to another
electrical resistance
The opposition to the flow of current
battery
provides potential difference
photocell
Device that converts light energy into electrical energy
thermocouple
measures used for really high temperatures
ammeter
measers current
voltmeter
measures potential difference
lamp
changes electrical energy into heat and light
longer wire or thinner wire
more resistence comes from this type of wire
Shorter wirer or thicker wire
less resistence comes from this type of wire
1
How many electrolights in a battery
2
How many electrodes in a battery
Static electricity
electricity that does not flow
Repel
similar charges
Attract
unlike charges
negativly
Substances become ________ charged if they gain electrons
positivly
Substances become ________ charged if they lose electrons
An atom
has a positivly charged nucleaus surronded by fast moving negativly charged electrons
Leclanche Cell
dry cell battery
4
A 6 volt battery has _ leclanche cells
6
A 9 volt battery has _ leclanche cells
1
A 1.5 volt battery has _ leclanche cells
same
current is _______ every where around a series circuit
adds
In a seriese curciut potential difference ___ to the potential difference of a battery
same
The potential difference across a parellel circuit is ______
conventional current
current that moves counter clock wise ( out of the positive side of the battery isn't true because only electrons move)
electron flow
current that moves clock wise (the real electron flow)