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19.7 Exercise 1

Avg difficulty 2.5

Consider a parallel plate capacitor, with no dielectric material, attached to a battery with a fixed voltage. What happens when a dielectric is inserted into the capacitor?

  1. Nothing changes, except now there is a dielectric in the capacitor.
  2. The energy in the system decreases, making it very easy to move the dielectric in.
  3. You have to do work to move the dielectric, increasing the energy in the system.
  4. The reversed polarity destroys the battery.

OpenStax College Physics 2e, 19.7 Energy Stored in Capacitors, exercise 1

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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.