PHYSICAL QUANTITY
Electrical voltage: formulas and units of measurement
Electrical voltage: symbol U, unit B. Formulas and explanations for Electricity.
UU\text{В}volt
KEY CONNECTIONS
Formulas
U=\frac{A}{q}U = A / q
U=IRU = IR
\mathcal{E}=U+Irε = U + Ir
NOTATION
Quantities in formulas
- 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.
- 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.
- R
- Electrical resistance is a measure of a conductor's resistance to electric current.
- \mathcal{E}
- Electromotive force is the work of external forces during the transfer of a unit charge.
- r
- Internal resistance is the resistance of the electric current source.
THEORY
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