10:10.pdf

# 10:10.pdf - Gauss Law applied Lecture 6(1 Infnite...

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Gauss Law applied Lecture 6.

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(1) Infinite plane/plate 1. Identify symmetry 2. Draw E field/field lines 3. Choose a gaussian surface 4. Compute E

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(2) Infinite line 1. Identify symmetry 2. Draw E field/field lines 3. Choose a gaussian surface 4. Compute E

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(3) Point (or sphere) 1. Identify symmetry 2. Draw E field/field lines 3. Choose a gaussian surface 4. Compute E

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(3B) Charged sphere 1. Identify symmetry 2. Draw E field/field lines 3. Choose a gaussian surface 4. Compute E

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FlipIt Physics: Where do I draw the surface?
Conductor: Where do charges want to go?

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Conductors vs insulators Conductor (Insulator) : Charge is free (not free) to move to establish electrostatic equilibrium Conductor have free charge: A sufficient and equal number of + and - charges can be “created” to cancel any E field in the conductor + + + + + + + +
All free charge is at the surface of conductors Use Gauss Law…

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Demo… Trash can of science (a.k.a. Faraday Pail)
E field from a multi-layer Sphere/Coax cable …approximations…

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Clicker questions
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