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$\bullet$ $\bullet$ Two very large parallel sheets of the A FIGURE 17.53same size carry equal magnitudes of charge Problem $52 .$spread uniformly over them, as shown inFigure 17.54 . In each of the casesthat follow, sketch the net patternof electric-field lines in the regionbetween the sheets, but far fromtheir edges. (Hint. First sketch thefield lines due to each sheet, andthen add these fields to get the netfield.) (a) The top sheet is positiveand the bottom sheet is negative, ashown, (b) both sheets are positive, (c) both sheets are negative.
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Physics 102 Electricity and Magnetism
Electric Charge and Electric Field
University of Washington
Simon Fraser University
University of Sheffield
In physics, potential energy is the energy possessed by a body or a system due to its position relative to others, stresses within itself, electric charge, and other factors. The unit for energy in the International System of Units (SI) is the joule (J). One joule is the energy expended (or work done) in applying a force of one newton through a distance of one metre (1 newton metre). The term potential energy was introduced by the 19th century Scottish engineer and physicist William Rankine, although it has links to Greek philosopher Aristotle's concepts of potentiality. Potential energy is associated with forces that act on a body in a way that the work done by these forces on the body depends only on the initial and final positions of the body, and not on the specific path between them. These forces, that are called potential forces, can be represented at every point in space by vectors expressed as gradients of a scalar function called potential. Potential energy is the energy of an object. It is the energy by virtue of a position relative to other objects. Potential energy is associated with restoring forces such as a spring or the force of gravity. The action of stretching the spring or lifting the mass is performed by a force that works against the force field of the potential. This work is stored in the field, which is said to be stored as potential energy.
In physics, electric flux is a measure of the quantity of electric charge passing through a surface. It is used in the study of electromagnetic radiation. The SI unit of electric flux is the weber (symbol: Wb).
The electric flux through a surface is calculated by dividing the electric charge passing through the surface by the area of the surface, and multiplying by the permittivity of free space (the permittivity of vacuum is used in the case of a vacuum).
The electric flux through a closed surface is zero, by Gauss's law.
Two very large parallel sh…
Two infinite, nonconductin…
Three very large sheets ar…
Three parallel sheets of c…
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