用天平测定电介质的相对介电常量

Measurement of relative dielectric constant by balance

利用分析天平 ,测出了带电平行板电容器两金属板间的相互吸引力F .根据F与两极板间电压U的函数关系 ,对测量数据进行回归计算 。

In the experiment, an analytical balance is used to measure the mutual attraction F between the two plates of a electrified parallel plate condenser. According to the functional relationship between F and U , which refers to the voltage of the condenser, we regress and count those figures and work out the relative permittivity of the dielectric spacer in the condenser.