In physics, current refers to the flow of electric charge through a conductive material. It is measured in amperes (A) and is denoted by the symbol 'I'. The concept of current is crucial to understanding Ohm's Law and how electricity behaves in circuits.

When a potential difference, or voltage, is applied across a conductor, it causes a flow of electrons. This flow of charge is the electric current. Think of it like water flowing through a pipe: the voltage is the pressure driving the water, and the current is the movement of the water molecules.

Current can flow in two directions: from positive to negative (conventional current) or from negative to positive (electron flow). Conventional current assumes the flow of positive charges, while electron flow considers the flow of negatively charged electrons. In practice, both conventions are used, but conventional current is more prevalent.

To better understand current, let's consider a simple example. Imagine a circuit with a battery connected to a light bulb by a wire. When the circuit is closed, electrons flow from the battery's negative terminal through the bulb and return to the battery's positive terminal. This flow of electrons constitutes the electric current in the circuit.