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Year 9
Physics KS3
Physics Y8 P1
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Created by
Maria Ali
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Cards (59)
Static electricity
A
build-up
of electric charge on an object that does
not
move in a circuit
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Types
of electric charge
Positive
Negative
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Charges
are
Like charges
repel
, unlike charges
attract
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Subatomic
particles
Electron
Neutron
Proton
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Electron
Negatively
charged
subatomic
particle
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Neutron
Neutral
subatomic particle
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Proton
Positively
charged
subatomic
particle
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Only
electrons
are transferred to other objects to create
static electricity
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Objects
without static electricity have a
neutral
charge
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Before rubbing, balloon and wool cloth are
neutral
After rubbing, balloon has
negative
charge and wool cloth has
positive
charge
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When
static electricity produces
lightning
or a spark, the electrons flow in a current
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Electric field
A region where there is a
force
on a charged material or
particle
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Current
electricity
The flow of
electrons
around a circuit
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Current
The amount of
charge
flowing in a circuit per
second
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Amps
The unit for measuring
current
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Ammeter
The tool used to measure
current
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The
electrons
in a current come from inside the
wire
, not the battery
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Incorrect circuits
Short
circuit,
incomplete
circuit, batteries connected wrong
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Potential difference
/
Voltage
The push provided by a cell or
battery
to make charges move through a
circuit
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Volts
The unit for
measuring
potential
difference
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Voltmeter
The tool used to measure
potential difference
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A
voltmeter
must be connected to
two
points in the circuit
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Rating
The
potential difference
a component is designed for
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Series
circuit
Components are joined in a
single
loop
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Parallel circuit
There are
2
or more paths or
branches
for the current
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Circuit
types
Series
circuit
Parallel
circuit
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Lights are usually wired in
parallel
so if one bulb
breaks
the others stay on</b>
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In a series circuit, the current is the
same
everywhere
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In a series circuit, the potential difference is shared and the voltages across
components
add up to the
battery
/cell voltage
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In
a series circuit, adding another light bulb
Makes the current
decrease
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In a parallel circuit,
current
is shared and the currents in the
branches
add up to the total
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In a
parallel
circuit, the potential
difference
is the same everywhere
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In
a parallel circuit, adding another
branch
Makes the current
increase
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Resistance
How easy or difficult it is for
charges
to flow through a
component
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Ohms
The unit for measuring
resistance
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Ω
The symbol for
ohms
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Equations
for voltage, current, resistance
Voltage =
Current
x
Resistance
Current =
Voltage
/
Resistance
Resistance
=
Voltage
/ Current
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Conductors
Have
low
resistance and
conduct
electricity well
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Insulators
Have
high
resistance and conduct electricity
poorly
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Magnet
A piece of
metal
with a strong attraction to another
metal
object
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