Search results
Results from the WOW.Com Content Network
The electric field was formally defined as the force exerted per unit charge, but the concept of potential allows for a more useful and equivalent definition: the electric field is the local gradient of the electric potential. Usually expressed in volts per metre, the vector direction of the field is the line of greatest slope of potential, and ...
The definition has drifted even further, and many authors now use the word electricity to mean electric current , energy flow , electrical potential , or electric force. Others refer to any electrical phenomena as kinds of electricity.
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.
Electrical energy is energy related to forces on electrically charged particles and the movement of those particles (often electrons in wires, but not always). This energy is supplied by the combination of current and electric potential (often referred to as voltage because electric potential is measured in volts) that is delivered by a circuit (e.g., provided by an electric power utility).
Centralised energy sources are large power plants that produce huge amounts of electricity to a large number of consumers. Most power plants used in centralised generation are thermal power plants meaning that they use a fuel to heat steam to produce a pressurised gas which in turn spins a turbine and generates electricity. This is the ...
In electric power transmission, wheeling is the transmission of power from one system to another through the third-party interconnecting network. [ 1 ] [ 2 ] [ 3 ] The wheeling provider, or utility, receives compensation for the service and for electricity losses incurred in the transmission.
Basal metabolic rate (BMR): This is the energy our body uses at rest to keep up with functions like breathing, circulation and digestion. It makes up the largest portion of our TEE, about 60% to 70% .
In terms of electromagnetism, one watt is the rate at which electrical work is performed when a current of one ampere (A) flows across an electrical potential difference of one volt (V), meaning the watt is equivalent to the volt-ampere (the latter unit, however, is used for a different quantity from the real power of an electrical circuit).