problem22_26

University Physics with Modern Physics with Mastering Physics (11th Edition)

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22.26: a) At a distance of 0.1 mm from the center, the sheet appears “infinite,” so: = × = = = = - . C N 662 m) 800 . 0 ( 2 C 10 50 . 7 2 2 2 0 9 0 0 ε A ε q E ε q A E d A E b) At a distance of 100 m from the center, the sheet looks like a point, so: . C N 10 75 . 6 m) (100 C) 10 50 . 7 ( 4 1 4 1 3 2 9 0 2 0 - - × = × = πε r q πε E c) There would be no difference if the sheet was a conductor. The charge would automatically spread out evenly over both faces, giving it half the charge density on any
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Unformatted text preview: as the insulator 2 : :). ( ε σ ε σ c E σ = = near one face. Unlike a conductor, the insulator is the charge density in some sense. Thus one shouldn’t think of the charge as “spreading over each face” for an insulator. Far away, they both look like points with the same charge....
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  • NoProfessor
  • Electric charge, Fundamental physics concepts, charge density

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