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An electric current is a flow of electric charge. Conventional current flows from the positive terminal of the power source to the negative terminal. ... In wires, negatively charged electrons carry charge. These are free to move from atom to atom in conductors such as metals.
A lot of people think of electron flow as electrons moving along a wire freely like cars go down a highway. Actually, it works a little differently. Any conductor(thing that electricity can go through) is made of atoms. Each atom has electrons in it.
An electric current is a flow of electric charge. In electric circuits this charge is often carried by moving electrons in a wire. It can also be carried by ions in an electrolyte, or by both ions and electrons such as in an ionised gas (plasma). ... These conduction electrons are the charge carriers in metal conductors.