Experiment 1: Ohm?s Law In this experiment, you will apply Ohm?sLaw to investigate the relationship between voltage, resistance andcurrent.

1. Plot a graph of Table 2. Consider which variable (voltage orcurrent) should be on the x and y axes.

2. What is the relationship between voltage and current? Usedata from your graph to support your answer.

3. Estimate the slope of the linear line and record it in Table3.

4. How does the value of the slope compare to the resistance youmeasured? Calculate the percent difference.

5. Use the results of your experiment to verify Ohm?s Law

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Resistivity and Ohm's Law 18. Add battery 4 as you did in step 10 and repeat steps 15. Record the current in Table 2. Lab 22 19. Remove the alligator clips from the battery, resistor, and multimeter. 20. Turn the dial on the multimeter to "2000" in the "Q" section. Place the red and black probe on opposite sides of the resistor to measure its resistance. Record this value in Table 3. Table 2: Voltage Readings of Different AA Battery Combinations Battery Combination 1 1 and 2 1, 2 and 3 1, 2, 3 and 4 Resistance (0) 10.3 Voltage (V) 1.58 3.09 4.63 6.21 Table 3: Resistor Data Slope (V/A) (0) Current (A) 1.4*10^-3 3*10^-3 4.45*10^-3 6*10^-3 Percent Difference Resistivity and Ohm's Law 18. Add battery 4 as you did in step 10 and repeat steps 15. Record the current in Table 2. Lab 22 19. Remove the alligator clips from the battery, resistor, and multimeter. 20. Turn the dial on the multimeter to "2000" in the "Q" section. Place the red and black probe on opposite sides of the resistor to measure its resistance. Record this value in Table 3. Table 2: Voltage Readings of Different AA Battery Combinations Battery Combination 1 1 and 2 1, 2 and 3 1, 2, 3 and 4 Resistance (0) 10.3 Voltage (V) 1.58 3.09 4.63 6.21 Table 3: Resistor Data Slope (V/A) (0) Current (A) 1.4*10^-3 3*10^-3 4.45*10^-3 6*10^-3 Percent Difference