Drift current refers to the flow of electric charge carriers, such as electrons or holes, in a conductive material under the influence of an electric field. This movement occurs when an external voltage is applied, causing the charge carriers to move in a specific direction, resulting in an electric current. Drift current is a key concept in understanding how electrical devices operate. In semiconductors, drift current plays a significant role alongside diffusion current. The combination of these currents determines the overall current flow in devices like diodes and transistors. Understanding drift current is essential for designing and analyzing electronic circuits and systems.