Which of the following phenomena helps to determine the concentration and mobility of charge carriers?

Which of the following phenomena helps to determine the concentration and mobility of charge carriers?

a) Mass Action Law
b) Diffusion Current
c) Fermi-Level Effect
d) Hall Effect

Correct Answer : d) Hall Effect

Explanation :

Carriers generate electric field intensity that helps to find out mobility and clarifies inverse relation to concentration of hall voltage. On the contrary, charge carriers defined by mass action law and diffusion current find out the concentration but cannot assist in determining mobility.