Question

State application of Hall effect. In a Hall effect experiment a potential difference of 4.5 μV is developed across a foil of zinc of thickness 0.02mm when a current of 1.5 A is carrying in a direction perpendicular to applied magnetic field of 2 tesla. Calculate :-

• Hall coefficient for zinc.

•  Concentration of electron.

Answer 1

If a current carrying conductor or semiconductor is placed in a transverse magnetic field, a potential difference is developed across the specimen in a direction perpendicular to both the current that the magnetic field. The phenomenon is called as HALL EFFECT.
The net electric field E acting on the charge carriers is a constant of the applied electric field E_x  and hall electric field E_H  . The angle made by E with the x axis is called the Hall angle which is given by:-

`theta _H = tan^-1  ((E_H)/(E_X))`