Hall voltage is the voltage difference that develops across a conductor when it carries an electric current in the presence of a magnetic field. This phenomenon occurs due to the Lorentz force, which acts on the charge carriers (like electrons) moving through the conductor. As these charge carriers move, they are deflected to one side, creating an accumulation of charge and resulting in a measurable voltage across the material. The Hall voltage is named after Edwin Hall, who discovered this effect in 1879. It is commonly used in various applications, such as Hall effect sensors, which can measure magnetic fields and are widely used in electronic devices and automotive systems.