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# EC1 - John Salek-Raham Ian Swanson Physics 152 EC1 EC1...

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John Salek-Raham Ian Swanson Physics 152, EC1 3/5/08 EC1: Electric Currents VI Data : In section V1, the current through a resistor was measured. The voltage applied across the resistor was also recorded. The resistance of the resistor was calculated using these two values, and is compared to the resistance measured by the multimeter. See attached data sheet for tabulated data. A B C D Rm + Uncertainty R = 21.5 + 0.2 35.0 + 0.3 74.5 + 0.6 155.8 + 1.4 In Section V2, Voltage and Current (V,I) were measured in pairs for a resistor. In this case, resistor D was used. In the previous section, resistor D was measured to have a resistance of 155.8 ohms. Voltage vs. Current (Across Resistor D) y = 0.1585x 0 1 2 3 4 5 6 0 5 10 15 20 25 30 35 Current (mA) Voltage (V)

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As one can see, plotting these values against each other yields a straight line, which is expected and follows ohm’s law. From the slope of this graph, one finds that the resistance, R = 158.5 ohms. In Section V2’, Voltage and Current (V,I) pairs were measured again, this time, however, across a silicone diode.
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EC1 - John Salek-Raham Ian Swanson Physics 152 EC1 EC1...

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