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Slide 1

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Charge (Q)
As we said, electricity is when electrons move around a
circuit and carry energy with them. Each electron has a
negative CHARGE. Charge is measured in Coulombs (C).
We can work out how much charge flows in a circuit using
the equation:
Charge = current x time
(in C) (in A) (in s)
I T…read more

Slide 2

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Example questions
Charge (C) Current (A) Time (s)
5 2
0.4 1
20 0.5
50 250
3 60
1) A circuit is switched on for 30s with a current of 3A. How much
charge flowed?
2) During electrolysis 6A was passed through some copper chloride
and a charge of 1200C flowed. How long was the experiment on
3) A bed lamp is switched on for 10 minutes. It works on a current of
0.5A. How much charge flowed?…read more

Slide 3

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Energy and charge
The amount of energy that flows in a circuit will depend on
the amount of charge carried by the electrons and the
voltage pushing the charge around:
Energy transferred = charge x voltage
(in J) (in C) (in V)
V Q…read more


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