电荷间相互作用力很小,而且电荷极易损失,所以教材中对“探究影响电荷间相互作用力的因素”这个演示只做定性研究,若要定量计算,实验操作难度较大,而且误差也大,效果不理想。针对这些不足,对此实验进行改进,用电子天平来测量库仑力,简化了实验原理,减小了实验误差,而且便于实际操作。 Charge interaction between the force is small, and the charge is very easy to lose, so the textbook on “to explore the factors that affect the force of charge ” This demonstration only qualitative research, to quantitative calculation, experimental operation more difficult, and The error is also large, the effect is not satisfactory. In response to these shortcomings, this experiment is improved, using the electronic balance to measure Coulomb force, simplifying the experimental principle, reducing the experimental error, but also easy to operate.