Scientific Ontology

E

Electromagnetism

Electric Field

Force per unit charge at a point in space.

volt per metre (V/m)

Dimension: $[\,M L T^{-3} I^{-1}\,]$

How values of electric field span the physical world (in V/m, log scale).

Fair-weather atmosphere

10² V/m

Breakdown of air

3.00 × 10⁶ V/m

Inside a hydrogen atom

5.00 × 10¹¹ V/m

Lower limit10^-2 V/mUpper limit10²¹ V/m

Lorentz Force

\vec{F} = q(\vec{E} + \vec{v} \times \vec{B})

Electric Field (point charge)

E = \dfrac{1}{4\pi\varepsilon_0}\dfrac{Q}{r^2}