Lab Homework

For next class, make 2 graphs:

current vs. resistance

voltage vs. resistance

Start to think about what these graphs suggest, maybe even writing down your thoughts.

There will be a few lab questions that you might want to start thinking about as well.  Here they are:

1.  What is Ohm's law?

2.  Are there things that do not "obey" Ohm's law?

3.  What are sources of error in this experiment?

4.  Would you expect to have the same readings if you left things running for a few minutes?  How about after an hour?

5.  What exactly is "internal resistance" and how is it relevant in this experiment?

6.  Somewhere, maybe in your conclusion, be sure to address why the graphs look as they do.

Don't forget that you'll also need these things in your lab:

Purpose
Hypothesis (copied from the earlier homework - don't change it, and include the graph you predicted)
Data table with correct units
Graphs with correct units
Questions
Conclusion

Thanks everybody!  You'll have some time in the next class to work on the lab.