chapter22-part1

chapter22-part1 - Electric field lines Imaginary lines or...

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1 Electric field lines Imaginary lines or curves drawn through a region of space such that their tangent at any point are in the direction of the electric field vector at that point Electric field lines (cont.) •Higher density of lines stronger field •Arrows define the direction of the field •Field lines never intersect (the field is uniquely defined at each point)
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2 Lines of Electric Field 8C How many field lines cross out of the circle? 8C 8 lines 16C 16 lines 16C 32C 32C 32 lines
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3 Lines of Electric Field 8C How many field lines cross out of the surface? 8C 8 lines 16C 16 lines 16C 32C 32C 32 lines Lines of Electric Field How many field lines cross out of the surface? ZERO!!!
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4 Gauss’s law Number of lines crossing the closed surface: 0!!! Observations • Charges outside the surface do not contribute to the sum • The number of lines crossing the surface is proportional to the net amount of charge inside • The number of crossing lines is independent of the shape of the surface
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This note was uploaded on 12/08/2010 for the course PHYSC 1220 taught by Professor Feiguin during the Fall '10 term at Wyoming.

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chapter22-part1 - Electric field lines Imaginary lines or...

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