PHYSICAL QUANTITY

Electric potential: formulas and units of measurement

Electric potential: symbol φ, unit B. Formulas and explanations for Electricity.

\varphiφ\text{В}volt

KEY CONNECTIONS

Formulas

\varphi=\frac{W_{\text{п}}}{q}φ = Wп / q

\varphi=k\frac{q}{\varepsilon r}φ = kq / (εr)

U=\varphi_1-\varphi_2U = φ₁ − φ₂

U=\frac{A}{q}U = A / q

NOTATION

\varphi: Potential is the energy characteristic of the electric field at a selected point.
W_{\text{п}}: Potential energy of a charge is the energy of a charge in an electric field.
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.
\varphi_1: The potential of the first point is the energy characteristic of the field at the first point.
\varphi_2: The potential of the second point is the energy characteristic of the field at the second point.
A: Work is a measure of energy transferred when a force is applied.

THEORY

PRACTICE