Electric current is a flow of electrical charge.
In a metal the the electrical current is due to the conduction electrons (otherwise known as Free electrons at GCSE). The coduction electrons are not 'bonded' to the nucleous of the atom and therefore free to move to other shells. This movement is current of electricity.
In electorlyte this is different. Electric current is due to ions (charged atoms). These Ions can be negitively or positively charged. the Negitively charged particles will gravitate to the Cathode (positively charged rods that attract the oppersite charged ions). Positively charged ions will gravitate to the Anode, which is negitively charged.
Conventional current - conventional current is the movement of electrons form the positive terminal to the negitave terminal of a cell or battery.
Electron flow - An electron flow is the oppersite direction to the conventional current. It flows from the negitive terminal to the positive terminal of a cell or battery.
They are oppersite becasue when convetional current moves around it displaces an electron. Imagine a round desk of 10 people, but there are 11 seats. This seat is the positively charged atom. When a person (an electron) moves to move the space forward the electron dispalaces. This is how they are in oppersite directions.
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