what is an electrical grid?
469188
Electric power transmission is one process in the delivery of electricity to consumers. The term refers to the bulk transfer of electrical power from place to place. Typically, power transmission is between the power plant and a substation near a populated area. This is distinct from electricity distribution, which is concerned with the delivery from the substation to the consumers. Due to the large amount of power involved, transmission normally takes place at high voltage (110 kV or above). Electricity is usually sent over long distance through overhead power transmission lines (such as those in the photo on the right). Underground power transmission is used only in densely populated areas (such as large cities) because of the high capacitive and resistive losses incurred.\n\nA power transmission system is sometimes referred to colloquially as a "grid". However, for reasons of economy, the network is rarely a grid (a fully connected network) in the mathematical sense. Redundant paths and lines are provided so that power can be routed from any power plant to any load center, through a variety of routes, based on the economics of the transmission path and the cost of power. Much analysis is done by transmission companies to determine the maximum reliable capacity of each line, which, due to system stability considerations, may be less than the physical limit of the line. Deregulation of electricity companies in many countries has led to renewed interest in reliable economic design of transmission networks. The separation of transmission and generation functions is one of the factors that contributed to the 2003 North America blackout.
315912
Other than direct discharges from lightning, fluctuations in the magnetic field can generate currents in the electrical grid.  This happens as a result of solar activity such as solar wind and flares bombarding the Earth's magnetic field causing it to flex.\n\nLong distance transmission lines are especially vulnerable to this as their length is enough to act as a generator from the magnetic changes.  Grids can shut down and transformers have been melted  due to power surges generated by strong solar storms.
1139618
Yes for instance your nervous system is an electrical system and electricity is effected by electric magnetic pulls.
120831
They are wires that carry high voltage electricity over long distances before it reaches your house at a much lower voltage.
445109
Ampère's circuital law . This equation describes how an electric current generates a magnetic field. Ampère's circuital law states that \n\nThe line integral of the magnetic field around any closed loop is equal to  times the algebraic sum of the currents which pass through the loop.
512437
Ground or earth in a mains (AC power) electrical wiring system is a conductor that exists primarily to help protect against faults and which in normal operation does not carry current.\n\nThe term "ground" is used in Canada and the U.S.; the term "earth" is used in most of the rest of the English-speaking world. They are used synonymously here.\n\nNeutral is a circuit conductor that carries current in normal operation, and which is connected to earth.\n\n    * In a polyphase or three-wire AC system, the neutral conductor is intended to have similar voltages to each of the other circuit conductors, and similar phase spacing. By this definition, a circuit must have at least three wires for one to serve as a neutral.\n    * In the electrical trade, the conductor of a 2-wire circuit that is connected to the supply neutral point is also referred to as the "neutral". This is formally described in the US and Canadian electrical codes as the "identified" circuit conductor. If the entire system is only single phase then the current carrying conductor that is tied to earth is still a neutral by this definition.\n\nThe NEC and Canadian electrical code only define neutral as the first of these. In North American use, the second definition is used in less formal language but not in official specifications. In the UK the IEE definition is a conductor connected to the supply system neutral point, which includes both these uses.
787904
generator.\n\nAn AC generator is turned by mechanical power like steam engine or a jet turbine. When its coils spin in a magnetic field, electricity is generated\n\n\nz
884089
You are confusing terms, amperes are a measure of current - charge per unit time. The closest thing to pressure in electrical terms is voltage, that is what drives current. Can we harness amperes? yes, we already do. Can we use it to make more electrical power? no, that would violate conservation of energy.
300542
"An assembly consisting of a magnet mounted on a frame, and a wire coil (armature) that can be rotated within the magnetic field. The function of the generator is to convert mechanical energy into electrical energy."\n\nBasically in a generator you can induce current by rotating a magnet inside a wire coil.  The opposite of this is a motor in which the electricity causes mechanical movement.
889220
AC or Alternate Current refers to the form in which electricity is delivered to businesses and residences.  This is the opposite of DC or direct current which is what batteries provide.
32092
A Solar cell is a device that converts the solar enery into electrical energy. They are also called Photovoltaic Cells. They are used in Solar Calculators, Street Lights, Some Traffic Lights, and Many more.
576166
the electrical circuit?
708021
The symbol for electrical load is Z called impedence.\n\nThis consists of the inducticve reactance, capacitative reactance and ohmic resistance.
1145411
i gues.....um.......Electricity
36968
Electric distribution uses the ground as a return leg of the circuit.  The voltage in your house, or in overhead lines, is held at a voltage above ground.  So you are completing a circuit.
790382
Power is defined as the rate of flow of energy past a given point. In alternating current circuits, energy storage elements such as inductance and capacitance may result in periodic reversals of the direction of energy flow. The portion of power flow that, averaged over a complete cycle of the AC waveform, results in net transfer of energy in one direction is known as real power. On the other hand, the portion of power flow due to stored energy, which returns to the source in each cycle, is known as reactive power.\n\nCalculating Reactive Power in AC Circuits \n\nThe reactive power is the power returned to the source by the reactive components of the circuit. This type of power is measured in Volt-Amperes-Reactive, abbreviated var. \n\nReactive power is calculated by using the voltage and current associated with the circuit reactance. \n\nFor more details refer the pages...\nhttp://www.ofgem.gov.uk/temp/ofgem/cache/cmsattach/13596_Mark_Lively_Response_Reactive_Power_Charges.pdf?wtfrom=/ofgem/work/index.jsp&section=/liveconsultation
970722
Electrical power is a little bit like the air you breathe: You don't really think about it until it is missing. Power is just "there," meeting your every need, constantly. It is only during a power failure, when you walk into a dark room and instinctively hit the useless light switch, that you realize how important power is in your daily life. You use it for heating, cooling, cooking, refrigeration, light, sound, computation, entertainment... Without it, life can get somewhat cumbersome. \n\nPower travels from the power plant to your house through an amazing system called the power distribution grid. \n\nThe grid is quite public -- if you live in a suburban or rural area, chances are it is right out in the open for all to see. It is so public, in fact, that you probably don't even notice it anymore. Your brain likely ignores all of the power lines because it has seen them so often. In this article, we will look at all of the equipment that brings electrical power to your home. The next time you look at the power grid, you will be able to really see it and understand what is going on! \n\nfor more pl. visit:\nhttp://www.howstuffworks.com/power.htm