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An electrical circuit is any closed loop that allows a flow of electrons in a current to deliver energy or perform work and then return to their source.
Material along which electrical current flows freely arecalled conductors. (e.g. copper-wire) The electrons emit and return to an energy supply.
Current is said to flow from positive to negative, because this is the conventional direction of current flow. It is a convention leftover from the when electricity was first discovered.
Electrons actually move through a conductor awayfrom the negative terminal and towards the positive terminal, because of the laws governing electric fields (like charges repel and unlike charges attract). The power-supply produces an EMF (electro-motive-force) that creates the potential difference necessary for electrons to flow freely along a conductor.
The natural force is called Electromagnetism.
Opposite charges attract. An electron will move away from a negative terminal and towards the positive.
In physics it is best to think of the current flow in a metallic conductor as being the overall net flow of negative charge since that is what carries energy This movement is known as net current drift and is slow compared to continual random motion of electrons. That random motion yields no overall displacement over time. Therefore power is neither consumed nor created along a current.
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