Electric current is defined as the rate of flow of electric charge through a conductor. It is a fundamental concept in electromagnetism, measured in amperes, and represents the movement of charged particles, typically electrons, from an area of higher potential energy to an area of lower potential. The establishment of a current requires a potential difference, or voltage, applied across a circuit. The magnitude of the resulting current is determined by the relationship between the applied voltage and the resistance of the conducting material. When current flows, it generates magnetic fields, illustrating the integral connection between electricity and magnetism within physical systems.