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PHYSICS
AQA GCSE: Physics - Electricity
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Created by
Gracie Horton
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Cards (47)
Proton
Positively charged particle
in the
nucleus
of an
atom
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Neutron
A
subatomic
particle that has
no charge
and that is found in the
nucleus
of an atom
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Ion
A
charged
atom
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Electric Field
The
field
around
charged particles
that exerts a
non-contact force
on other
charged particles.
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Non-Contact Force
A force that one object can apply to another object without touching it
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Line of Force
The path that a
positive charge
would follow due to the
electric field
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Cell
Pushes
electrons
around a complete
cicuit
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Battery
Two
or
more cells
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Switch
Enable the current in a
circuit
to be turned
on
or
off
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Lamp
Emits
light
when
current
passes through it
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Diode
A device that
permits current
to flow through it in only
one direction.
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Light-emitting Diode
(
LED
)
combines the propertied of a diode and a lamp
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Ammeter
A device used to measure
current
in a circuit
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Fixed Resistor
limits
the
current
in a
circuit
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Variable Resistor
Allows current
to be
varied
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Fuse
A
safety device
with a
thin metal strip
that will
melt
if
too much current
passes through a
circuit
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Heater
Designed to
transfer energy
from an electric current to
heat
the surroundings
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Voltmeter
A device used to measure
voltage
, or
electrical potential energy difference
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Electrons
Negatively
charged
subatomic
particles
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Series
A circuit in which all
parts
are connected
end
to
end
to provide a
single
path of
current.
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Potential Difference
The work done by each Coulomb of charge
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Parallel
A circuit in which
parts
are connected in
separate circuits
to
each other
to provide a
single path
of
current.
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Charge Equation
=
Energy Transferred÷Potential Difference
=
E÷V
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Unit of Charge
Coulomb
(
s
)
C
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Unit of Current
Ampere
(
s
)
A
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Unit of Potential Difference
Volt
(
s
)
V
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Resistance Equation
=
Potential Difference÷Current
=
V÷I
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Unit of
Resistance
Ohm
(s)
Ω
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Ohm's Law
The
current
through a resistor at a
constant temperature
is
directly proportional
to the
Potential difference
across the resistor
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Thermistor
A
resistor
that changes its
resistance
with a
change
of
temperature.
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Light Dependent Resistor
A resistor which has high resistance in the dark, and low resistance in bright light
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Total
Resistance of a
series circuit
Sum of the resistances of every component
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Total potential difference
of a series circuit
Sum
of the
potential differences
of every
cell
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Current of a series circuit
The same current passes through each component
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Potential difference in a series circuits
Potential difference
is
shared
between the
components
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Total Current in a parallel circuit
The
sum
of the
currents
through each
branch
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Total resistance of a parallel circuit
Always
less
than the resistor with the
least
resistance
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Alternating current
A
flow
of
electric charge
that
regularly reverses
its
direction.
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Live Wire
The
brown wire
in a
cable
or
plug.
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Neutral Wire
A wire that carries current away from the component; it is coated in
blue plastic.
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