Lec06 - Lecture 6 Lecture 6-1 Electrostatic Shielding...

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Unformatted text preview: Lecture 6 Lecture 6-1 Electrostatic Shielding (Continued) + + + + + + Add Q If you now add charge Qto the conductor and/or Qon the outside of the conductor, the interior electric fields do not change. Q If you move charge q in the cavity, the exterior electric fields and the extreior charge distribution are not affected. Conducting shell electrostatically shields its exterior from changes on the inside. q Conducting shell electrostatically shields its interior from changes on the outside, too. Lecture 6 Lecture 6-2 Electric Potential Energy of a Charge in Electric Field dW qEdl = caa i Coulomb force is conservative => Work done by the Coulomb force is path independent . Can associate potential energy to charge q at any point r in space. () Ur h Its energy! A scalar measured in J (Joules) dU dW qEdl = = caa i dl a Lecture 6 Lecture 6-3 Electric Potential Energy of a Charge (continued) dW qEdl = caa i () () r i U Ur Ui qEdl = = h h chh i dU dW...
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Lec06 - Lecture 6 Lecture 6-1 Electrostatic Shielding...

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