This is a picture of the data we collected during our first experiment on Monday and the graph we created using that data. The circuit consisted of a power supply in series with a home made resistor and an ammeter. We measured the voltage across the resistor with various input voltages. We then calculated the power by using this voltage and the measured current and made a graph of voltage vs. current. This graph shows the voltage and current are directly proportional, and also that power is directly proportional to their product. The second set of data points came from the group across from us.
We also performed a lab on Monday in which we measured the resistance of several different coils of wire with varying cross sections, lengths, and material properties. The above picture shows a graph of resistance vs. length. This was the graph that came out the best and shows that resistance is indeed directly proportional to length just as we suspected.
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