Questions
SPHY001 Practice Quiz - Unit 18 | LA058
Single choice
两个带电粒子以大小F的力相互吸引。如果一个粒子的电荷加倍，粒子间距也加倍，则作用于这两个粒子的力大小为
Options
A.F
B.4F
C.2F
D.F/2
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Step-by-Step Analysis
在这个问题中，我们需要应用库仑定律的核心关系：力 F 与两粒子间的电荷乘积成正比、与距离的平方成反比，即 F ∝ (q1 q2) / r^2。接下来逐项分析各选项。
选项A：F。若只改变了粒子间的距离而不改变电荷量，或者改变了电荷却没有同时考虑距离的影响，可能会得到不同的结果。但在本题中还伴随了电荷量的......Login to view full explanationLog in for full answers
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