PHYS208 3/18 Class
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Pre-Exam Wrap-Up
Resources for Midterm Exam
Previous Exams
Quizzes: 1-4
Concept Checks: 1-14
Four "kinds" of integrals in PHYS208 so far:
- Direct integration of dE or dV over charge distributions
- Line integrals over E.ds to find V
- Surface integrals to find the electric flux for application of Gauss's law
- Volume integrals to find the charge enclosed by gaussian surface
Situations in PHYS208 where Gauss's law may be used to evaluate
the electric field at a point:
- Point (or spherical) symmetry
-- example: point charge, sphere of charge
-- gaussian surface to use:
sphere centered about center of charge distribution
- Line (or cylindrical) symmetry
-- example: infinite line of charge, infinite cylinder of charge
-- gaussian surface to use:
closed cylinder sharing axis of charge distribution
- Sheet (or planar) symmetry
-- example: sheet of charge, conducting surface
-- gaussian surface to use:
thin can with end caps parallel to surface
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ghw@udel.edu.
"http://www.physics.udel.edu/~watson/phys208/clas0318.html"
Last updated March 16, 1998.
Copyright George Watson, Univ. of Delaware, 1998.