1. This small group activity is designed to provide practice computing line integrals in polar coordinates, and to set the stage for Stokes' Theorem.
  2. Students work in small groups to evaluate a particular line integral along different paths.
  3. The whole class wrap-up discussion reinforces the “Use what you know!” strategy, and emphasizes the (mostly!) path-independent nature of these particular integrals, which correspond to Ampère's Law.

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