# Passes a current therefore the voltage current

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passes a current therefore, the voltage-current relationship between the light bulb and the resistor are different. Are both curves linear? Is one curve more linear than another? If so, which one? Both curves actually form loops and this can be seen with the data obtained from the plot. However, comparing the two plots, the IV curve for the resistor appears to be more linear than the IV curve for the light bulb. In what voltage range are the IV curves not linear, if at all? Comparing the two IV curves above, the voltage range for the IV curve of the resistor seems to be linear for all voltage range while the IV curve for the light bulb seems to appear not linear on all voltage range except when the voltage in between -1.5 to 1.5 Volts. Calculate the slope for the more linear curve. What is the physical meaning of the slope for the voltage-current graph? Using the linear fit on data studio, the actual linear fit of the IV curve for the resistor is 0.102 5.100x10 -5 . The physical meaning of the slope for the voltage current graph is that it shows that the resistance is constant on the 10 ohm resistor that we used for this experiment. Conclusion: In this lab, the main sources of error when it comes to measurements would be systematic errors; that is the resulting uncertainties are from the instruments that we used throughout the lab such as the DMM and the data studio. The data studio took multiple data of the voltage and current and so in this case, taking more data would not work. However, the uncertainty of the voltage, given by the data studio, is so small that it could be somewhat disregarded or ignored. In addition, the uncertainty of the light bulb is unknown but the resistor we used for the lab was the red-black-black-gold and this had a tolerance of 5% resulting in an uncertainty of 1 ohm. This might not make much of a difference in the IV curve of the resistor however, if the resistor we used had a higher tolerance percentage, the IV curve of the resistor might not look as linear as it is now.
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• Spring '11
• shpyrko
• Resistor, Electrical resistance, Abigail Cruz, Lawrence Chuc

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