A2L Item 218

Goal: Reason regarding capacitors

Source: 283-540 Adding capacitors in series

A capacitor, C1, is connected to a battery until charged, and
then disconnected from the battery. A second capacitor, C2,
is connected in series to the first capacitor. What changes occur in
capacitor C1 after C2 is connected as shown?

  1. V same, Q increases, U increases
  2. V same, Q decreases, U same
  3. V increases, Q decreases, U increases
  4. V decreases, Q same, U decreases
  5. None of the above
  6. Cannot be determined



(5) All quantities remain the same. Some students may consider the
capacitors to be connected in parallel despite the figure.