Ohm's Law (1)

Voltage (V) Current (A) 0.78 3.5 1.48 6.6 2.05 9.2 2.25 10.1 2.76 12.4 3.32 14.9 3.56 16 3.8 17 4.55 20.4 4.83 21.6 CALCULATIONS AND ANALYSIS 1. Calculate V/I for each pair of voltage current reading. Compute the average of your V/I value. This is one estimate for the resistance R. Voltage (V) Current (A) V/I 0.78 3.5 0.223 * 1000 = 223 Ohm 1.48 6.6 0.224 * 1000 = 224 Ohm 2.05 9.2 0.223 * 1000 = 223 Ohm 2.25 10.1 0.223 * 1000 = 223 Ohm 2.76 12.4 0.223 * 1000 = 223 Ohm 3.32 14.9 0.223 * 1000 = 223 Ohm 3.56 16 0.223 * 1000 = 223 Ohm 3.8 17 0.224 * 1000 = 224 Ohm 4.55 20.4 0.223 * 1000 = 223 Ohm 4.83 21.6 0.224 * 1000 = 224 Ohm Average of V/I Values: 0.223 = 223 Ohm 2. Draw a graph showing the relation between voltage (y-axis) and current (x-axis). Draw the best fit straight line through the points on your graph. Calculate the slope of this line as another estimate for R.