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Current is the rate of flow of charge through a conductor
Our intro said that everything is made up of tiny particles and some of them have a charge.
When these tiny charged particles move through a material we call this electrical current.
Normally, when we talk about current, we mean the movement of electrons (tiny negatively charged particles) through a conductor like a wire.
To count all of the electrons moving would be very difficult because they are tiny so we tend to package them together in a packet called a coulomb.
A coulomb is a packet of a lot of electrons in fact we are talking 6.24x10^18 electrons which is 6240000000000000000 electrons!!!
The time it takes for a coulomb to pass a point in circuit is called electrical current.
1 Ampere (1 Amp) of current is when one coulomb of charge passes a point in one second).
You may be asked to evaluate a model of current as electrons moving from the negative to the positive terminal of a battery, through the circuit.
A model is a simplified way of describing a complicated idea. There will always be advantages and disadvantages of any particular model.
This one is good because it shows the electrons moving from negative to positive terminals around the circuit.
One problem is it makes it looks like the electrons are really big compared to the wire.
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