1 2 3

5) Assume that the capacitor is fully charged. When the switch is first
closed so the battery is no longer in the circuit,how much charge is on
the capacitor C? What is the potential difference Voacross the plates?


6)Is the current in the circuit a maximum or a minimum right after
the switch is closed? Does this current flow throughthe capacitor?
Explain.


7) How is the potential difference across the resistor related to that
across the capacitor?


8) What happens to the potential difference across the capacitor as
charge drains away from it? Explain.


9) What happens to the potential difference across the resistor at the
same time? Explain.


10) If the potential across the resistor starts to change what must
happen to the current in the circuit? Explain.


11) Why does the draining of charge from the capacitor eventually
stop? Why does the current in the circuit go to zero?


After you complete your discussion of these eleven questions, mail your
Word file to phy212.


Homework: Qualitative Analysis of your Data.
For Thursday, Oct. 9th

  1. Derive the theoretical expression for the voltage versus time function for
    an RC circuit. You may start from first principles or copy it from a textbook
    on the InfoMall. Explain your procedure and/or give the citation.
  1. Mail the data from your 15 runs to yourself to use in your analysis.
    Compare the theoretical results to each of your 15 runs. Discuss how well
    your data compares to the theoretical predictions.


Compute the half-life for each run from your data and from the theory and
compare those values. The half-life is the time required for the voltage to
decrease to half of its value at t0.


Print this to hand-in on Thursday, October 9th.

[CONVERTED BY MYRMIDON]