lecture 12 101005 - Electric Field Line Patterns Point...

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Electric Field Line Patterns s Point charge s The lines radiate equally in all directions s For a positive source charge, the lines will radiate outward s For a negative source charge, the lines will point inward More Electric Field Line Patterns s An electric dipole consists of two equal and opposite charges s The high density of lines between the charges indicates the strong electric field in this region s Two equal but like point charges s At a great distance from the charges, the field would be approximately that of a single charge of 2q s The bulging out of the field lines between the charges indicates the repulsion between the charges s The low field lines between the charges indicates a weak field in this region Crazy Electric Field Patterns s Unequal and unlike charges s Note that two lines leave the +2q charge for each line that terminates on -q s On an irregularly shaped conductor, the charge accumulates at locations where the radius of curvature of the surface is smallest (that is, at sharp points) Conductors in Electrostatic Equilibrium When no net motion of charge occurs within a conductor,
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lecture 12 101005 - Electric Field Line Patterns Point...

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