User:Exuwon/Sandbox/Templates/Template:Table of electromagnetic constants

Quantity	Symbol	Value (SI units)	Relative Standard Uncertainty
magnetic constant (vacuum permeability)	$\mu _{0}\,$	4π × 10−7 N·A−2 = 1.256 637 061... × 10−6 N·A−2	defined
electric constant (vacuum permittivity)	$\varepsilon _{0}=1/(\mu _{0}c^{2})\,$	8.854 187 817... × 10−12 F·m−1	defined
characteristic impedance of vacuum	$Z_{0}=\mu _{0}c\,$	376.730 313 461... Ω	defined
Coulomb's constant	$k_{e}=1/4\pi \epsilon _{0}\,$	8.987 551 787... × 109 N·m²·C−2	defined
elementary charge	$e\,$	1.602 176 487(40) × 10−19 C	2.5 × 10−8
Bohr magneton	$\mu _{B}=e\hbar /2m_{e}$	927.400 915(23) × 10−26 J·T−1	2.5 × 10−8
conductance quantum	$G_{0}=2e^{2}/h\,$	7.748 091 7004(53) × 10−5 S	6.8 × 10−10
inverse conductance quantum	$G_{0}^{-1}=h/2e^{2}\,$	12 906.403 7787(88) Ω	6.8 × 10−10
Josephson constant	$K_{J}=2e/h\,$	4.835 978 91(12) × 1014 Hz·V−1	2.5 × 10−8
magnetic flux quantum	$\phi _{0}=h/2e\,$	2.067 833 667(52) × 10−15 Wb	2.5 × 10−8
nuclear magneton	$\mu _{N}=e\hbar /2m_{p}$	5.050 783 43(43) × 10−27 J·T−1	8.6 × 10−8
von Klitzing constant	$R_{K}=h/e^{2}\,$	25 812.807 557(18) Ω	6.8 × 10−10