Page 896 - Basic Electrical Engineering

Figure 12.14 Hall effect transducer

Hall coefficient is defined as the ratio of the output voltage to the product

of the current and magnetic field, i.e., e /(I × B) divided by the thickness of
o
the element, t. Thus,

Hall coefficient is the characteristic of the material, i.e., it depends on the

material from which the conductor is made. To understand how a potential
gets developed due to Hall effect, let us consider the following explanation.

When current flows through the conductor, it consists of the movement of
charge carriers. In the presence of a perpendicular magnetic field, the moving
charges experience a force, called the Lorenz force. This makes the path of

the moving charge somewhat curved (and not a straight line flow) so that
charges accumulate on one face of the conductor material. Equal and opposite

charges start appearing on the other face of the conductor material where
there is a shortage of mobile charges. This results in unequal and asymmetric