Electromagnetic Testing Chapter 3- Electromagnetic Testing

Equation (3.4) holds true only when the semiconductor has an infinite lengthto-width
ratio. For practical purposes, Eq. (3.4) reduces to Eq. (3.5):
V H = k(I c )(B sinθ) (3.5)
where k is a constant that combines the Hall coefficient, temperature, and
semiconductor geometry.
From this equation we can see that if the input current is held constant, the
Hall voltage will be directly proportional to the normal component of the
magnetic field. If either the magnetic field or input current is alternating, an
alternating Hall voltage will be produced. When both the input current and
magnetic field are direct current, a direct current Hall voltage will be produced.
Direct current magnetic fields are commonly produced by small, strong,
permanent magnets.
Charlie Chong/ Fion Zhang