EngiRef / Electromagnetic Constant

Vacuum Permittivity

Vacuum Permittivity (ε₀) = 8.8542 × 10^-12 F/m. Electric constant. Appears in Coulomb's law. A electromagnetic constant in the free EngiRef reference, with 27…

electromagneticε₀

Specification

Name
Vacuum Permittivity
Symbol
ε₀
Value
8.8542 × 10^-12
Unit
F/m
Category
electromagnetic
Description
Electric constant. Appears in Coulomb's law.

Constants

Related constants

Scientific constants

Vacuum Permeability

Magnetic constant. Since the 2019 SI redefinition μ₀ is a measured quantity; 4π × 10⁻⁷ H/m is the pre-2019 exact value and now differs in the 10th digit.

electromagneticμ₀

Coulomb Constant

1/(4πε₀). Force between point charges.

electromagnetickₑ

Faraday Constant

Charge per mole of electrons. F = Nᴀ × e.

electromagneticF

Speed of Light in Vacuum

Exact defined value in SI. Maximum speed in universe.

fundamentalc

Planck Constant

Exact defined value in SI. Relates photon energy to frequency.

fundamentalh

Reduced Planck Constant

h/(2π). Common in quantum mechanics.

fundamentalℏ