FB pixel

Physical Constants

The speed of light in free space (

), which is the phase velocity of any electromagnetic radiation in free space, is

m/s. This is commonly rounded up to

m/s. This rounding incurs error of

%, which is usually much less than other errors present in electrical engineering calculations.

The charge of an electron is

C. The constant

C is known as the “elementary charge,” so the charge of the electron is said to be

.

The permittivity of free space (

) is

F/m.

The permeability of free space (

)

H/m.

The wave impedance of free space (

) is the ratio of the magnitude of the electric field intensity to that of the magnetic field intensity in free space and is

. This is also sometimes referred to as the intrinsic impedance of free space.

 

Ellingson, Steven W. (2018) Electromagnetics, Vol. 1. Blacksburg, VA: VT Publishing. https://doi.org/10.21061/electromagnetics-vol-1 CC BY-SA 4.0

 
Book Finished!Book Finished!
Go back to previous pagePrevious Page
Use left and right arrow keys to change pagesUse left and right arrow keys to change pages.
Make Bread with our CircuitBread Toaster!

Get the latest tools and tutorials, fresh from the toaster.

What are you looking for?