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Electricity – dominoes
voltmeter
The flow of electric
charge, measured in
amperes
Used to control the
amount of current
flowing in a circuit
electric current
variable resistor
Symbol for a LDR
(light dependent
resistor)
Anything in a circuit
which reduces the
flow of current.
Measured in ohms
resistance
Symbol for a
thermistor
Equation for
calculating
potential difference
in volts
V = IR
A circuit in which
every component is
connected in a line,
end to end
series circuit
A resistor that is
dependent on the
intensity of light
LDRs
Equation for
calculating energy
transferred.
Measured in joules
E=Pxt
Current that is
constantly changing
direction
alternating
current (ac)
The rate of
transferring energy.
Measured in watts
(W)
power
Current that always
flows in the same
direction
direct current
(dc)
Network of cables
that distributes
electrical power to
consumers
national grid
Device which can
change the
potential difference
of an ac supply
transformer
The brown wire.
Carries an
alternating
potential difference
from the mains
live wire
Equation to
calculate charge in
coulombs (C)
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Electricity – dominoes
Q=Ixt
Type of resistor –
their resistance
depends on their
temperature
thermistor
A component that
only allows current
to flow through in
one direction
diode
Blue wire in a cable
that carries current
away from an
appliance
neutral wire
Equation to
calculate power in
watts (W)
P=VxI
Driving force that
pushes electric
charge around a
circuit (measured in
volts)
potential
difference
Symbol for a LED
(light emitting
diode)
Measures the
current through a
component
ammeter
Yellow and green
wire used for
protecting the
wiring and safety
A conductor with
resistance that is
constant at a
constant
temperature
ohmic
conductor
Ohm’s Law
earth wire
V=IxR
Symbol for a
variable resistor
Calculating energy
transferred from
potential difference
and charge
E=QxV
Frequency and
potential difference
of mains electricity
Circuit where all
components are
connected
separately to each
end of the battery
parallel circuit
Symbol for a diode
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50 Hz
230 V
Measures potential
difference across a
component
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Electricity – dominoes
Teaching notes
There are 32 cards, allowing it to be used with a whole class. The activity could also be done
individually, in pairs or in small groups to produce a complete ordered set of cards.
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