It can be shown very easily from Equs. 5-42 and 5-44 that the Hall parameter is a ratio between the azimuthal and perpendicular electron velocities. This is shown in Equ. 5-45.

• 网友解答：从式(5-42)和（5-44）可以容易看出，霍尔参数是水平电子速度与垂直电子速度间的比值，见式(5-45).