Instantaneous Power
type: QuantityKind
description: For a two-terminal element or a two-terminal circuit with terminals A and B, $\textit{Instantaneous Power}$ is the product of the voltage $u_{AB}$ between the terminals and the electric current i in the element or circuit: $$p = u_{AB} \cdot i$$ Where $u_{AB}$ is the line integral of the electric field strength from A to B, and where the electric current in the element or circuit is taken positive if its direction is from A to B and negative in the opposite case. $$$$ For an n-terminal circuit, it is the sum of the instantaneous powers relative to the n - 1 pairs of terminals when one of the terminals is chosen as a common terminal for the pairs. $$$$ For a polyphase element, it is the sum of the instantaneous powers in all phase elements of a polyphase element. $$$$ For a polyphase line consisting of m line conductors and one neutral conductor, it is the sum of the m instantaneous powers expressed for each line conductor by the product of the polyphase line-to-neutral voltage and the corresponding line current.
applicable unit: ExaW
applicable unit: GigaW
applicable unit: KiloW
applicable unit: MegaW
applicable unit: MicroW
applicable unit: MilliW
applicable unit: NanoW
applicable unit: PetaW
applicable unit: PicoW
applicable unit: TeraJ-PER-SEC
applicable unit: TeraW
applicable unit: http://qudt.org/vocab/unit/W
has dimension vector: A0E0L2I0M1H0T-3D0
informative reference: http://www.electropedia.org/iev/iev.nsf/display
informative reference: http://www.iso.org/iso/home/store/catalogue_tc/catalogue_detail.htm
informative reference: https://en.wikipedia.org/wiki/Power
latex definition: $p = ui$, where $u$ is instantaneous voltage and $i$ is instantaneous electric current.
specialization of: ElectricPower
symbol: p
comment: Applicable units are those of quantitykind:ElectricPower
broader: ElectricPower