PHYSICAL QUANTITY

Electrical voltage: formulas and units of measurement

Electrical voltage: symbol U, unit B. Formulas and explanations for Electricity.

Uvolt

KEY CONNECTIONS

Formulas

U = A / q

U = IR

ε = U + Ir

NOTATION

: Electric voltage is the work done by the electric field when transferring a unit charge.
: Work is a measure of energy transferred when a force is applied.
: Electric charge is a quantity that determines the participation of a body in electrical interaction.
: Current strength is the charge passing through the cross section of a conductor per unit time.
: Electrical resistance is a measure of a conductor's resistance to electric current.
: Electromotive force is the work of external forces during the transfer of a unit charge.
: Internal resistance is the resistance of the electric current source.

THEORY

PRACTICE

Topics in order: the concepts, quantities and formulas of a lesson with explanations and examples.

Statements, answer options and a detailed walkthrough for every topic of the course.

A 10-question check-up, exercises with answer checking, and saved progress.