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Exam 1 90 8070 60 5040 Average 78.4 Median 84 Outline Applications of Gauss’s Law - The single Fixed Charge -Field of a sphere of charge -Field of a.

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Presentation on theme: "Exam 1 90 8070 60 5040 Average 78.4 Median 84 Outline Applications of Gauss’s Law - The single Fixed Charge -Field of a sphere of charge -Field of a."— Presentation transcript:

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2 Exam 1 90 8070 60 5040 Average 78.4 Median 84

3 Outline Applications of Gauss’s Law - The single Fixed Charge -Field of a sphere of charge -Field of a spherical shell -A Line of Charge Conductors and Insulators The electric field of a conductor The field in the cavity of a conductor; Faraday’s Cage

4 Gauss’s Law The total flux of electric field out of any closed surface is equal to the charge contained inside the surface divided by.

5 A Charged, Thin Sheet of Insulating Material + + + + + + + + + + +

6 Conductors and insulators Charges reside at the surface of the conductor Conductor E=0 + ++ + + + + + + + + + + + +

7 There is no electric field inside a conductor Net charge can only reside on the surface of a conductor Any external electric field lines are perpendicular to the surface (there is no component of electric field that is tangent to the surface). The electric potential within a conductor is constant

8 since inside the conductor. For any two points and inside the conductor The conductor’s surface is an equipotential.

9 Equipotential Surfaces An equipotential surface is a surface on which the electric potential V is the same at every point. Because potential energy does not change as a test charge moves over an equipotential surface, the electric field can do no work on such a charge. So, electric field must be perpendicular to the surface at every point so that the electric force is always perpendicular to the displacement of a charge moving on the surface. Field lines and equipotential surfaces are always mutually perpendicular.

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11 A field in a cavity of a conductor Faraday’s cage

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14 Have a great day!


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