Phys 0175 - Lecture 11

Phys 0175 - Lecture 11 - Reminder: Homework Assignments:...

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Unformatted text preview: Reminder: Homework Assignments: PHYS 0175 LON-CAPA HW #03 Now Open: Due on Sunday(@10pm), February 1 st PHYS 0175 LON-CAPA HW #04 Now Open: Due on Sunday(@10pm), February 8st Lecture 11 (Jan. 30, 2009): Chapter 24: Electric Potential (contd) Calculating the El. Potential from the El. Field The electric potential energy of a system of point charges Illustrative examples Equipotential surfaces for some typical charge configurations: Note that electric field lines and equipotential surfaces are always perpendicular to each other. Reason: Displacement along an equipotential surface must be perpendicular to the electric force if there is to be zero work done by the electric force. One can determine the electric potential from knowing the electric field, and vice versa: ; ; x y z V V V E E E x y z = - = - = - b a b a V V E dl- = r r g E V = - r r The electric field vector is the negative potential gradient An Isolated Conductor in an External Electric Field: The picture shows an uncharged conductor suspended in an external electric field. The free electrons in the conductor distribute themselves on the surface as shown, making the net electric field inside the...
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This note was uploaded on 04/06/2009 for the course PHYS 0175 taught by Professor Koehler during the Spring '08 term at Pittsburgh.

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Phys 0175 - Lecture 11 - Reminder: Homework Assignments:...

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