在静电场中,很多参考书中都有这么一道题目,答案也一致,笔者认为此答案值得商榷.题目.两相同的金属小球,分别带电后分开一定的距离放置,相互间的静电力大小为F,若将两球接触后再分开放回原处,相互间的静电力大小仍为F,则两球原先带电荷应为(A)一定是等量同种电荷.(B)可能是不等量同种电荷.(C)可能是不等量异种电荷.(D)可能是等量异种电荷. In the electrostatic field, many reference books have such a topic, the answer is the same, I think this answer is questionable. Two identical metal ball, respectively, after charging a certain distance to place the electrostatic force between each size F, if the two ball contact and then put back into place, the electrostatic force between each size is still F, then the two ball original charge should be (A) must be the same amount of the same type of charge (B) may be Not equal amount of the same kind of charge (C) may not equal amount of dissimilar charge (D) may be the same amount of dissimilar charge.