Ohm's Law.docx - Erin Sullivan Ohm’s Law Part 1 Ohm’s...

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Erin Sullivan 1/31/17 Ohm’s Law Part 1: Ohm’s Law for carbon resistors 0 0 0 0 0 0.01 0.01 0.01 0.01 0.01 0 0.5 1 1.5 2 2.5 f(x) = 282.67 x − 0.02 R² = 0.99 Ohms Law IR(A) VR(V) Lower 95% Upper 95% Intercept -0.021525 -0.07104991 0.0280003 I(mA ) I(A) V(V) 7.92 0.00792 2.12 6.69 0.00669 1.96 5.28 0.00528 1.58 4.11 0.00411 1.1 3.56 0.00356 0.95 3.05 0.00305 0.82 2.67 0.00267 0.72 2.25 0.00225 0.6 2 0.002 0.54 1.82 0.00182 0.49 1.56 0.00156 0.42 1.39 0.00139 0.37 1.16 0.00116 0.31 0.96 0.00096 0.26 0.59 0.00059 0.16
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Slope 282.6676 7 269.128806 296.20654 R(Exp) 282.6676 7 269.128806 296.20654 R(Measured ) 282.6676 7 282.666261 282.68181 R(Label) 270 256.5 283.5 The above table of I and V values was found by setting up the appropriate circuit and using a battery box, a resistor (rheostat), an ammeter and a voltmeter. The ammeter was connected in series to measure the current (I) of the rheostat and the voltmeter was connected in parallel to measure the voltage (V) change of the rheostat. We recorded 15 corresponding ammeter and voltmeter values from each point we moved the rheostat to. The above graph was plotted using the I vs V table. The graph is linear so we then used Excel to find the intercept and slope values. The intercept does capture 0 so we can conclude the resistor obeys Ohm’s Law. The slope is the resistance and that value is 282.66767 and that value does overlap with the resistance
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  • Fall '09
  • PB
  • Resistor, Electrical resistance

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