Scientific Ontology

q

Electromagnetism

Electric Charge

Property of matter causing electromagnetic interaction.

coulomb (C)

Dimension: $[\,I T\,]$

How values of electric charge span the physical world (in C, log scale).

Electron

1.60 × 10^-19 C

Static shock

10^-6 C

Lightning

1.50 × 10¹ C

Lower limit1.60 × 10^-19 CUpper limit10⁶ C

Capacitance

C = \dfrac{Q}{V}

Coulomb's Law

F = \dfrac{1}{4\pi\varepsilon_0}\dfrac{q_1 q_2}{r^2}

Lorentz Force

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

Capacitor Discharge

Q = Q_0 e^{-t/RC}

Electric Field (point charge)

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

Electric Potential (point charge)

V = \dfrac{1}{4\pi\varepsilon_0}\dfrac{Q}{r}