Name:__________________________Physics Post-lab 212P-5Resistance and Ohm's LawName:__________________________Section:_____ Date:__________Q1. The (United States) National Electric Code, which sets maximum safe currents for rubber-insulated copper wires of various diameters, is given (in part) below. Plot the safe current densityas a function of diameter. Gaugea4 6 8 10 12 14 16 18Diameter, milsb204 162 129 102 81 64 51 40Safe current, A 70 50 35 25 20 15 6 3Q2. Which wire gauge has the maximum safe current density?a A way of identifying the wire diameter.b 1 mil = 10-3 in.Q3. The resistance of a resistor is measured at several temperatures, as shown below. Plot thedata and a linear fit to answer the following questions.T, C 50 100 150 200 250 300R, 139 171 203 234 266 298Q4. Find the value of resistance at 0 C, 20 C and 265 C.Q5. Find the temperature coefficient of resistance (instead of resistivity) with a referencetemperature of 20
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