slope was linear. The graph was ohmic because it follows ohm’s law and that is proven when R=V/I. The
code calculated measurement for 360 Ohms, and the calculated resistance using the slope was 353.23
which shows the graph was accurate.
Part two of the lab demonstrated that the light bulb had an internal resistance, and the higher the
voltage the lower the resistance. The reason for this is that the energy is transferred into heat/light and
for that to happen the resistance needs to be lower. The graph was divided into two parts, and the slope

for the first couple of point was to match the internal resistance of the light bulb. However the resistance
form the graph was 9.67 Ohms and the measured resistance of the light bulb was 5.6 Ohms which is a
discrepancy. The reason for this discrepancy is that we used mA’s to measure the current compared to
using Amps. Although the behavior of the graph was accurate as the voltage increased the resistance
started to decrease. The same method and concept for measure the resistance was used from part one
of the lab. This graph is nonohmic because it does not follow the ohm’s law and the behavior of this
graph is not linear.
Part three of the lab showed the correlation between resistivity and the length and cross section of an
object. The object that was used in the lab is a graphite rod, and the measurements started at he ends of
the rod and were moved closer together reaching the center. The resistance at .061m was 18.295 ohms
and when the clips were moved closer together at .009m the resistance was 4.659 Ohms. Resistivity is
dependent on the length and cross section of an object as the graph shows. The slope in part there is the
resistivity of the graphite object, and by using the object area it was possible to isolate the resistivity.