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The ampere is named for French physicist and mathematician André-Marie Ampère (1775–1836), who studied electromagnetism and laid the foundation of electrodynamics.In recognition of Ampère's contributions to the creation of modern electrical science, an international convention, signed at the 1881 International Exposition of Electricity, established the ampere as a standard unit of ...
In direct current (DC) circuits, this product is equal to the real power, measured in watts. [3] The volt-ampere is dimensionally equivalent to the watt: in SI units, 1 V⋅A = 1 W. VA rating is most used for generators and transformers, and other power handling equipment, where loads may be reactive (inductive or capacitive).
The watt-second is a unit of energy, equal to the joule. One kilowatt hour is 3,600,000 watt seconds. One kilowatt hour is 3,600,000 watt seconds. While a watt per hour is a unit of rate of change of power with time, [ iii ] it is not correct to refer to a watt (or watt-hour) as a watt per hour.
They made the volt equal to 10 8 cgs units of voltage, the cgs system at the time being the customary system of units in science. They chose such a ratio because the cgs unit of voltage is inconveniently small and one volt in this definition is approximately the emf of a Daniell cell , the standard source of voltage in the telegraph systems of ...
10 15: peta-~2 × 1.00 × 10 15 W: tech: Omega EP laser power at the Laboratory for Laser Energetics. There are two separate beams that are combined. 1.4 × 10 15 W geo: estimated heat flux transported by the Gulf Stream. 5 × 10 15 W geo: estimated net heat flux transported from Earth's equator and towards each pole. Value is a latitudinal ...
Introducing the constant of proportionality, the resistance, [14] one arrives at the usual mathematical equation that describes this relationship: [15] =, where I is the current through the conductor in units of amperes , V is the potential difference measured across the conductor in units of volts , and R is the resistance of the conductor in ...
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Electric power is the rate of transfer of electrical energy within a circuit.Its SI unit is the watt, the general unit of power, defined as one joule per second.Standard prefixes apply to watts as with other SI units: thousands, millions and billions of watts are called kilowatts, megawatts and gigawatts respectively.