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Electrets, like magnets, are dipoles. Another similarity is the fields: they produce an electrostatic field (as opposed to a magnetic field) outside the material.When a magnet and an electret are near one another, a rather unusual phenomenon occurs: while stationary, neither has any effect on one another.
In electromagnetism, the absolute permittivity, often simply called permittivity and denoted by the Greek letter ε (), is a measure of the electric polarizability of a dielectric material.
Cooke and Wheatstone's two-needle telegraph as used on the Great Western Railway. The Cooke and Wheatstone telegraph was an early electrical telegraph system dating from the 1830s invented by English inventor William Fothergill Cooke and English scientist Charles Wheatstone.
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I can’t say, ‘Oh don’t go there, there’s a bomb there, and there’s a guy over there, make sure you watch him and don’t get shot.’ You are praying that the decision you make is the right one, and if it is the wrong one – which a couple of decisions were the wrong ones – you are paying the price and you are living with it.
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Électricité de France SA (French pronunciation: [elɛktʁisite də fʁɑ̃s]; lit. ' Electricity of France '), commonly known as EDF, is a French multinational electric utility company owned by the government of France.
In Kosovo, a state-owned energy company plans to destroy a village to make way for expanded coal mining as the government and the World Bank plan for a proposed coal-burning power plant. The government has already forced roughly 1,000 residents from their homes. Many former residents claim officials violated World Bank policy requiring borrowers to restore their living conditions at equal or ...