State the Hall effect. Derive the expression for Hall voltage and Hall coefficient with neat diagram.
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.