Hall voltage

• When a current flows at 90° through a magnetic field, there will be a magnetic force on the electrons flowing through the wire, forcing them to one surface of the conductor.
• The direction of the force will be given by Fleming’s left-hand rule.
• The build-up of electrons on one surface will cause it to become negative and the other surface positive.
• This creates an electric field between the surfaces and causes an electric force on the electrons in the opposite direction.
• In the end, the magnetic force and the electric force will balance, and an equilibrium is reached.
• The potential difference between the surfaces, measured with a voltmeter, when this equilibrium is reached, is denoted as VH.