When an object is connected between two points with
different electric potential (V), a flow of charge occurs.
The amount of charge (measured in Coulomb) that flows
in the object through a cross-sectional area (A) in every
second is called current, which is measured in Ampere.
Under an applied voltage, the amount current flowing in a
circuit depends directly on the resistance of the load.
Ohm’s law describes a linear relationship between the
potential difference V, the flowing current I, and the
resistance R of the object as