Electric Force

Core Sentence / 核心句

Electric force is the force caused by electric charge and electric field.

中文理解：电力是电荷之间或电荷在电场中受到的力。

Formula / 公式或规则

$\vec{F}=q\vec{E}$

For two point charges:

$F=k\frac{|q_1{q}_2|}{r^2}$

When To Use / 什么时候用

看到 force on a charge、charged particle acceleration，就用 electric force。

Watch Out / 易错点

正负号影响方向；大小和方向最好分开处理。

Search and Source Mentions / 搜索与出现位置

Mentioned In / 出现位置

• AP电磁学第1次正课-电荷库仑定律与电场 · Knowledge Point 11: Electric Forces Add as Vectors
  • Knowledge Point 11: Electric Forces Add as Vectors
• AP电磁学第1次正课-电荷库仑定律与电场 · Knowledge Point 10: Coulomb Force vs Gravitational Force
  • - electric force can attract or repel / 电力可吸引也可排斥
• AP电磁学第1次正课-电荷库仑定律与电场 · Knowledge Point 3: Like Charges Repel; Unlike Charges Attract
  • - electric force
• AP电磁学第1次正课-电荷库仑定律与电场 · 5. Deep Phrases / 深句对应表
  • | Electric forces add as vectors. | 多电荷题不能只加大小，要做矢量合成。 |
• AP电磁学第1次正课-电荷库仑定律与电场 · 8. Confusion / Questions
  • 1. 为什么 electric charge 是 scalar，而 electric force 和 electric field 是 vectors？
• AP电磁学第1次正课-电荷库仑定律与电场 · Type 3: Charged Object and Neutral Object
  • ...r to the charged object, while the like charge is farther away. Since electric force depends on distance, the attraction is stronger than the repulsion, so the net force is a...
• AP电磁学第1次正课-电荷库仑定律与电场 · Type 5: Motion in Uniform Electric Field
  • parallel to electric force: constant acceleration
• 第11次正课 · full Lorentz-force law

Connected Notes / 连接

• Electric Field
• AP电磁学第11次正课-磁场洛伦兹力与带电粒子运动
• Lorentz Force
• Coulomb’s Law
• Newton’s Second Law