# Physics 1 Lab: Welcome to the IV league

```Physics Lab: Resistance is Futile!
(DCP, CE)
Write a lab report including the following:
Research Question: How does the resistance of a conductor (a pencil lead) depend on the length of
the conductor?
Variables:
Independent: length
Dependent: Resistance
Materials:
Procedure:
Use the ohmmeter supplied to measure the resistance of a pencil lead of some easily
the resistance. Note the uncertainty in the resistance reading (how much does it
fluctuate by? +/- 0.1 ? +/- 0.5 ?). Note also the uncertainty in your length
measurements (+/- 1 cm? +/- 1 mm?). Include these in your data tables and
subsequently on your graphs as error bars. Take several readings at each length.
Data tables:
Include units, labels, uncertainties in both R and L for all data.
Graphs:
Which variable goes on which axis? Include error bars for both R and L. Graph the
data and draw a best fit line, and then a maximum possible slope line and a minimum
possible slope line. Calculate the slopes of each to obtain an average slope and an
uncertainty value. Consult your teacher and old lab/worksheet packets showing
what is required for obtaining a maximum score for the IB DCP criteria.
Conclusion
&amp; Evaluation