07 Appendix/符号与常量表.md1.1 KB
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---2
aliases:3
- AP Physics C E&M Constants4
tags:5
- ap-physics-c-em6
- appendix7
- constants8
status: curated9
---10
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# 符号与常量表12
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## 常量14
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- 元电荷:$e = 1.60 \times 10^{-19}\ \text{C}$16
- 真空介电常数:$\varepsilon_0 = 8.85 \times 10^{-12}\ \text{C}^2/(\text{N}\cdot\text{m}^2)$17
- 库仑常量:$k_e = \dfrac{1}{4\pi\varepsilon_0} \approx 8.99 \times 10^9\ \text{N}\cdot\text{m}^2/\text{C}^2$18
- 真空磁导率:$\mu_0 = 4\pi \times 10^{-7}\ \text{T}\cdot\text{m}/\text{A}$19
- 常用换算:$1\ \text{T} = 1\ \text{N}\cdot\text{s}/(\text{C}\cdot\text{m})$20
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## 常见符号22
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- $q, Q$:电荷量24
- $\lambda$:线电荷密度25
- $\sigma$:面电荷密度26
- $\Phi_E$:电通量27
- $\Phi_B$:磁通量28
- $V$:电势或电势差29
- $U$:势能或储能30
- $C$:电容31
- $R$:电阻32
- $\rho$:电阻率33
- $I$:电流34
- $L$:电感35
- $\mu$:磁偶极矩36
- $\tau$:时间常数或力矩,需结合语境37
- $\kappa$:介电常数38
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## 相关40
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- [[电荷与电场]]42
- [[电容器与电介质]]43
- [[磁场与洛伦兹力]]44
- [[电感与RL、LC电路]]45
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