Electrical equations – dominoes
0.1 J
A charge of 60
coulombs passes a
point in a circuit in 10
seconds. Calculate
the current.
0.83 A
0.5 A flows in a
circuit. How much
charge passes through
a point in the circuit
in 2 minutes?
900 C
0.5 A flows in a
circuit. How long
does it take for 100 C
to flow past a certain
point?
50 s
When 20 C are moved
between two points in
an electric field, 5 J of
work are done.
Calculate the potential
difference.
5V
20 C are moved
between two points in
an electric field. The
potential difference is
12 V. How much work
is done?
60 J
260J of work is done
moving charge. The
potential difference
between the two
points is 240V. What
charge is moved?
4.17 C
The current in a series
circuit is 2A. The
resistance of a bulb is
5 ohms. Calculate the
potential difference
across the bulb.
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25128
6A
A charge of 10
coulombs passes a
point in a circuit in 12
seconds. Calculate the
current.
60 C
0.25 A flows in a
circuit. How much
charge passes through
a point in the circuit in
1hour?
200 s
0.3 A flows in a circuit.
How long does it take
for 15 C to flow past a
certain point?
0.4 V
When 10 C are moved
between two points in an
electric field, 50 J of
work are done.
Calculate the potential
difference.
240 J
5C are moved between
two points in an electric
field. The potential
difference is 12V. How
much work is done?
1.08 C
1 000 J of work is done
moving charge. The
potential difference
between the two points
is 240V. What charge is
moved?
10 V
The current in a series
circuit is 9 A. The
resistance of a
component is 6 ohms.
Calculate the potential
difference across this
component.
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Electrical equations – dominoes
2.33 ohms
State the resistance
across a component
when the potential
difference is 40 V and
the current
is 8 A.
5 ohms
Calculate the current in a
series circuit whose total
resistance is 10 ohms and
potential difference is 30
V. the potential
difference is 7V and the
current is 3A.
3A
Calculate the current in a
series circuit whose total
resistance is 2 ohms and
potential difference is
0.5 V. the potential
difference is 7V and the
current is 3A.
0.25 A
A machine transfers 1
000 J of energy in 60
seconds. What is its
power?
16.67 W
A machine transfers 50
000 J of energy in 20 s.
What is its power?
2.5 kW
A 5 kW machine is
on for 2 minutes.
How much energy is
transferred?
600 kJ
A 0.5 kW machine is
on for 8 minutes.
How much energy is
transferred?
240 kJ
How long would it
take for a 5 W
machine to transfer 5
J of energy?
1s
How long would it take
for a 0.8 kW machine
to transfer 100 J of
energy?
0.125 s
A hair dryer requires
11 A of current from a
110 V outlet. How
much power does it
use?
297 W
A clock uses 3 W of
power from a 1.5 V
battery. What
amount of current is
supplying the clock?
54 V
State the resistance
across a component
when the potential
difference is 7 V and
the current is 3 A.
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1 210 W
2A
25128
A food blender is
plugged into a 110 V
outlet that supplies 2.7
A of current. Calculate
the power.
A radio uses 5 W of
power from a 2 V
battery. What amount
of current is supplying
the clock?
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Electrical equations – dominoes
2.5 A
A screen uses 90 W of
power and the
current
supplied is 4.5 A.
What voltage is
required?
480 J
How much energy is
transformed when
the potential
difference is 240 V
and the charge 3 C?
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25128
20 V
How much energy is
transformed when
the potential
difference is 120 V
and the charge 4 C?
720 J
How much energy is
transformed when
the potential
difference is 0.5 V
and the charge
is 0.2 C?
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Electrical equations – dominoes
Teaching notes
This is a domino style activity which requires students to know or use equations for GCSE
Physics / Additional Science. It is based on those currently required by AQA. 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.
To allow for differentiation, harder cards (require rearranging of equations) have been
shaded red/pink, whereas the simpler ones (no rearranging needed) are shaded green.
NB: Although the last few cards are shaded green (as no rearranging), this equation is
Higher tier only.
When attempting this activity, students should be familiar with the following electrical
equations.
current = charge ÷ time
potential difference = work done ÷ charge
potential difference = current x resistance
power = energy ÷ time
energy = potential difference x charge (HT only)
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25128
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