What is current?

Free electrons are present in all conductors and
semiconductors. When a potential difference is applied across any conductor, electrons in a conductor flow from the higher potential to the lower potential. This flow of electrons constitutes the current.

Simply speaking current is nothing but the flow of electrons in a conductor.
Current can also be considered as the rate at which the charge moves through
the conductor, measured at any particular point

I = V / R

 V = potential
difference across the conductor.
R = resistance offered by the conductor to the flow of

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