04 - Electric Field II

04 Electric Field - Phys 212 Fall 2009 Electric Field II Review Field of a Point Charge Physics Idea Use Coulombs Law in denition of E eld q0 E

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Phys 212 - Fall 2009 8/28/2009 Electric Field II
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Review - Field of a Point Charge E = F q 0 = k | q || q 0 | r 2 q 0 = k | q | r 2 E Field of a Point Charge Points in radial direction Depends only on source charge strength Gets weaker as 1/r 2 q 0 r !"! $!!"! %!!!"! %$!!"! ’!!!"! ! !"% !"’ !"( !"$ E- Field distance Physics Idea: Use Coulomb’s Law in de±nition of E ±eld
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Field and Force I Between the red and the blue charge, which of them experiences the greater electric feld due to the green charge? +2 +1 +1 +1 d d 1) red 2) blue 3) same for both
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Field and Force II Between the red and the blue charge, which of them experiences the greater electric force due to the green charge? +2 +1 +1 +1 d d 1) red 2) blue 3) same for both
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Electric Field Strength Try this at home!
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Field Lines for Multiple Charges Use test charge and ±nd net force
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Field Line Rules 1. Field lines point away from positive charges. 2. Field lines point toward negative charges.
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This note was uploaded on 10/03/2011 for the course PSYC 212 taught by Professor Ilieva during the Fall '09 term at South Carolina.

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04 Electric Field - Phys 212 Fall 2009 Electric Field II Review Field of a Point Charge Physics Idea Use Coulombs Law in denition of E eld q0 E

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