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EM & Vector calculus #3 Physical Systems, Tuesday 30 Jan 2007, EJZ Vector Calculus 1.3: Integral Calculus Line, surface, volume integrals Fundamental theorems.

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Presentation on theme: "EM & Vector calculus #3 Physical Systems, Tuesday 30 Jan 2007, EJZ Vector Calculus 1.3: Integral Calculus Line, surface, volume integrals Fundamental theorems."— Presentation transcript:

1 EM & Vector calculus #3 Physical Systems, Tuesday 30 Jan 2007, EJZ Vector Calculus 1.3: Integral Calculus Line, surface, volume integrals Fundamental theorems Integration by parts Ch.3a: Special Techniques (Electrostatics) Quick homework review Poisson’s and Laplace’s equations (Prob. 3.3 p.116) Uniqueness Method of images (Prob. 3.9 p.126)

2 1.2.6 Product rules

3 1.2.7 Second derivatives

4 1.3.1 Line, Surface, Volume integrals

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9 1.3.2 Fundamental theorem of calculus

10 1.3.3 Fundamental theorem for Gradients

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12 1.3.4 Fundamental theorem for Divergences

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15 1.3.5 Fundamental theorem for Curls

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17 Consequences Gauss’s law and fundamental theorem for divergences: Ampere’s Law and fundamental theorem for curls:

18 E&M Ch.3: Techniques for finding V Why? Easy to find E from V Scalar V superpose easily How? Poisson’s and Laplace’s equations (Prob. 3.3 p.116) Guess if possible: unique solution for given BC Method of images (Prob. 3.9 p.126) Separation of variables (next week)

19 Poisson’s equation Gauss: Potential: combine to get Poisson’s eqn: Laplace equation holds in charge-free regions: Prob.3.3 (p.116): Find the general solution to Laplace’s eqn. In spherical coordinates, for the case where V depends only on r. Do the same for cylindrical coordinates, assuming V(s). (See Laplacian on p.42 and 44)

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23 Method of images A charge distribution  induces  on a nearby conductor. The total field results from combination of  and . + - Guess an image charge that is equivalent to . Satisfy Poisson and BC, and you have THE solution. Prob.3.9 p.126 (cf 2.2 p.82)

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