Hall coefficient

例句：

1. 1. The Hall coefficient of the material is 0.5.
   材料的霍尔系数为0.5。
2. 2. The Hall coefficient can be used to measure the magnetic properties of materials.
   霍尔系数可以用来测量材料磁性属性。
3. 3. The Hall coefficient is a measure of how much a magnetic field affects an electric current.
   霍尔系数是衡量磁场对电流影响的度量。