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Physics of Energy (Charges (image, Charge migration and dissipation:…
Physics of Energy
Charges
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Charge separation mechanisms: Contact between surfaces results in transfer of charge as electrons to match up energy levels.
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Electric Field
Induced charge: The electric field from each side of a sheet of uniform charge density ⌠ (C m-2) is: E=⌠ /(2∑o)
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Capacitance
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Dielectrics: If an insulator is placed between the plates of a parallel plate capacitor the capacitance is increased.
Force between charges: Q1 and Q2, is proportional to the quantities of charge.
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Potential: is defined as the amount of work needed to bring a unit charge from infinity to that point.
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Electric flux density: The 'flow' or flux of electric field across any spherical surface enclosing a point charge.
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Gauss' law: states that the nett flux through any surface equals the nett charge enclosed within that surface
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Electrical breakdown: If an electric field, in air at normal temperature and pressure, increases above about 3 MV m-1 then ‘electrical breakdown’ occurs.
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