电荷不会凭空产生,也不会凭空消失,只能从一个物体转移到另一个物体,或从物体的一部分转移到另一个部分,电量的总和保持不变,这个实验规律称为电荷守恒定律.我们知道物体带电的实质就是电子的得失,在接触起电中,也是由于其中一个物体失去电子,另外一个物体得到电子,若两个完全相同的金属小球, The charge will not be generated out of thin air, nor will it disappear out of thin air. It can only be transferred from one object to another, or from one part of an object to another, and the sum of the charge remains unchanged. This experimental law is called conservation of charge. We know that the essence of an object’s electrification is the gain or loss of an electron. In contact and electrification, it is also because one of the objects loses electrons, and the other object gets electrons. If two identical metal balls are missing,