PHYSICAL QUANTITY

Electric field strength: formulas and units of measurement

Electric field strength: symbol E, unit V/m, N/Cl. Formulas and explanations for Electricity.

E

\frac{\text{V}}{\text{m}},\ \frac{\text{N}}{\text{Kl}}

volt per meter, newton per coulomb

KEY CONNECTIONS

Formulas

E = \frac{F}{q}

E = F / q

E = k \frac{∣ q ∣}{ε r ^{2}}

E = k|q| / (εr²)

E = \frac{U}{d}

E = U / d

E = \frac{σ}{2 ε _{0}}

E = σ / (2ε₀)

σ = \frac{q}{S}

σ = q / S

NOTATION

$E$: Electric field strength is the strength characteristic of the electric field.
$F$: Force is a measure of the interaction of bodies that changes their movement or shape.
$q$: Electric charge is a quantity that determines the participation of a body in electrical interaction.
$k$: The Coulomb coefficient is the coefficient of electrical interaction of charges in a vacuum.
$\varepsilon$: Dielectric constant is a characteristic of the influence of the medium on the electric field.
$r$: The distance between charges is the length of the segment between the charges under consideration.
$U$: Electric voltage is the work done by the electric field when transferring a unit charge.
$d$: Distance - the length of the space between selected points.
$\sigma$: Surface charge density is the charge per unit surface area.
$\varepsilon_0$: Electric constant is a coefficient characterizing the electric field in a vacuum.
$S$: Area is the size of a surface or cross section.

THEORY

PRACTICE