PHYSICAL QUANTITY

Electric charge: formulas and units of measurement

Electric charge: symbol q, Q, unit Cl. Formulas and explanations for Electricity.

q,\ Q

q, Q

\text{Kl}

pendant

KEY CONNECTIONS

Formulas

q = I t

q = It

F = k \frac{∣ q _{1} q _{2} ∣}{ε r ^{2}}

F = k|q₁q₂| / (εr²)

E = \frac{F}{q}

E = F / q

E = k \frac{∣ q ∣}{ε r ^{2}}

E = k|q| / (εr²)

φ = k \frac{q}{ε r}

φ = kq / (εr)

U = \frac{A}{q}

U = A / q

m = k_{el} q

m = kelq

W = k \frac{q _{1} q _{2}}{ε r}

W = kq₁q₂ / (εr)

NOTATION

$q$: Electric charge is a quantity that determines the participation of a body in electrical interaction.
$I$: Current strength is the charge passing through the cross section of a conductor per unit time.
$t$: Time is a quantity characterizing the duration and sequence of events.
$F$: Force is a measure of the interaction of bodies that changes their movement or shape.
$k$: The Coulomb coefficient is the coefficient of electrical interaction of charges in a vacuum.
$q_1$: The first charge is the electric charge of the first body under consideration.
$q_2$: The second charge is the electric charge of the second body in question.
$\varepsilon$: 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.
$E$: Electric field strength is the strength characteristic of the electric field.
$\varphi$: Potential is the energy characteristic of the electric field at a selected point.
$U$: Electric voltage is the work done by the electric field when transferring a unit charge.
$A$: Work is a measure of energy transferred when a force is applied.
$m$: Mass is a scalar physical quantity that is a measure of the inertia of a body.
$k_{\text{el}}$: Electrochemical equivalent is the mass of a substance released by a unit charge.
$W$: Energy is a measure of a system's ability to do work.

THEORY

PRACTICE