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19.4 Equipotential Lines

Surfaces of constant voltage lying perpendicular to field lines, why every conductor surface is one, and what grounding does.

College Physics 2e, 19.4 Equipotential Lines

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3 exercises

19.4 Exercise 1

How would the figure be different with two positive charges replacing the two negative charges?

  1. The equipotential lines would have positive values.
  2. It would actually resemble the figure.
  3. no change
  4. not enough information
2.5

19.4 Exercise 3

As isolines of electric potential get closer together, the electric field gets stronger. What shape would a hill have as the isolines of gravitational potential get closer together?

  1. constant slope
  2. steeper slope
  3. shallower slope
  4. a U-shape
2.5

19.4 Exercise 5

How much work is necessary to keep a positive point charge in orbit around a negative point charge?

  1. A lot; this system is unstable.
  2. Just a little; the isolines are far enough apart that crossing them doesn’t take much work.
  3. None; we’re traveling along an isoline, which requires no work.
  4. There’s not enough information to tell.
2.5

Adapted from College Physics © 2022 Rice University. Licensed under CC BY 4.0. Sources: College Physics 2e, College Physics for AP® Courses 2e. Imported at revision f98d7a7.