I= Q/t =neSv （1A=1C/s）
I=U/R (部分电路欧姆定律）或I=E(电动势)/(R[外]+r[内]) 或I=E/(R+Rg[检测器电阻]+r)(闭合电路欧姆定律）
在I= Q/t中如果正负离子同时移动形成电流，那么Q为两种电荷的电量和
英语解释：
Current which is also called current strength, is an expression form which shows the pass of the electric quantity in a stated times. The symbol of current is (I) and the unit of current is (A). I=Q/t
