摘要
在自制的密绕螺线管上接通交流电源后，利用互感现象可测定真空中的磁导率μ０，其方法简便实用．
It is shown in the paper the measurement of permeability of vacuum ( μ 0 ) by mutual inductance of the self made two coils, one used as the primary coil and the other the secondary. When the primary coil is attached to 220V(AC), in the secondary coil an EMF will be induced. The method is easy and practial.
