“静电场的描绘”实验中，通常采用方法是用一对电极产生的恒定电流模拟一对等量异种电荷产生的静电场．传统测试方法如图１，是用电压表直接测出电场中的几条等势线，根据等势线和电场线垂直的关系画出电场线．但是，这种方法，无论测量如何准确，其所测出的等势线总是发... In the “delineation of electrostatic field” experiment, the usual method is to use a constant current generated by a pair of electrodes to simulate the electrostatic field generated by a pair of equal dissimilar charges. The traditional test method is shown in Fig. 1. Several equipotential lines in the electric field are directly measured by a voltmeter. The electric field lines are drawn based on the equipotential lines and the vertical relationship of the electric field lines. However, this method, no matter how accurate the measurement, the measured equipotential lines are always...