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
3 Lines of Electric Field Lines of Electric Field 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
5 Gauss’s Law : Cartoon Version Σ (E-field-lines) α Charge Enclosed α The number of electric field lines

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• Fall '10
• Feiguin
• Magnetic Field, Electric charge, eht fo tuo, fo tuo ssorc

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