Experiment 2: Resistance of Play-Doh®In this experiment, you will experimentally determine how area and length affect resistance using Play-Doh®.Materials3 Alligator ClipsAluminum Foil2 AA BatteriesAA Battery HolderDigital Multimeter Play-Doh®RulerScissorsVernier CalipersProcedurePart 1: Relationship between Resistance and Length1. Prepare the digital multimeter by inserting the black cord into the “COM” port and the red cord into the “VΩmA” port in the bottom right corner. You will be using multiple functions of the multimeter. 2. Turn the multimeter on using the switch under the dial. 3. Turn the dial of the multimeter until the arrow points to the “20” in “DCV”. 4. Place two AA batteries into the battery holder so that the negative ends of the batteries touch the spring end of the battery holder. 5. Measure the voltage across the two batteries by touching the metal probes of the multimeter to the metal knobs on the battery holder. Record this value in Table 4.6. Use scissors to carefully cut two 4 x 4 cm squares from the aluminum foil. 7. Starting at one side of one foil square, roll (or fold) the foil into a rod. Squeeze the rodbetween your fingers after you have rolled it to get it firmly packed.Note: This step is important because the foil will be used to conduct a current! 8. Repeat Step 7 for the second foil square. 9. Roll out the Play-Doh® into a cylinder with a length of 20 cm and a uniform diameter of approximately 10 – 15 mm. 10. Use the Vernier caliper to measure the diameter of the cylinder every five centimeters to check for uniformity. Record the average radius (half the diameter) in Table 4. © 2014 eScience Labs, LLC.All Rights Reserved11. Create a circuit by pushing one aluminum foil rod through one end of the cylinder so that the foil rod is perpendicular to cylinder and the ends of the foil stick out of the cylinder (Figure 5). Place the ruler above the cylinder with the aluminum foil rod at the 0 cm mark. 12. Use one alligator clip to connect the aluminum foil rod in the cylinder to the positive end of the battery holder (indicated by a “+” sign). 13. Connect the negative side of the battery holder (indicated by a “-” sign) to the metal probe of the black cord of the multimeter with the second alligator clip. Figure 5: Circuit diagram.14. Connect one end of the third alligator clip to the metal part of the red cord. The free end will be used to connect and disconnect the circuit. 15. Turn the dial on the multimeter to “20m” on “DCA” section. 16. Push the second aluminum foil rod through the far end of the cylinder (the maximum distance) so that the foil rod is perpendicular to the cylinder and the ends of the rod are exposed. 17. Use the ruler to measure the distance between the aluminum rods. Record this value in meters in Table 5. 18. Complete the circuit by connecting the free alligator clip to the second aluminum foil rod. Record the first value for the current you see on the multimeter after about ten seconds in Table 5 and disconnect the alligator clip. It is important to not let the current flow through the Play-Doh® for too long. 19. Repeat Step 18 a few more times to make ensure consistent results. If the results are not consistent report the average current for a few trials. © 2014 eScience Labs, LLC.All Rights Reserved20. Take the second aluminum rod out and move it two centimeters closer to the first aluminum rod. Repeat Steps 18 - 20 until the distance between the aluminum foil rods is has reached six centimeters. 21. Disconnect the circuit after all data has been collected. *Table 5 won’t be completed until you finish the Post-Lab QuestionsPart 2: Relationship between Resistance and Area1. Prepare the digital multimeter by inserting the black cord into the “COM” port and the red cord into the “VΩmA” port in the bottom right corner. You will be using multiple functions of the multimeter. 2. Turn the multimeter on using the switch under the dial. 3. Turn the dial of the multimeter until the arrow points to the “20” in “DCV”. 4. Place the two AA batteries into the battery holder and measure the voltage across thetwo batteries. Record this value in Table 6. 5. Use scissors to carefully cut two 4 x 4 cm squares from the aluminum foil. 6. Starting at one side of one foil square, roll (or fold) the foil into a rod. Squeeze the rodbetween your fingers after you have rolled it to get it firmly packed.Note: This step is important because the foil will be used to conduct a current! 7. Repeat Step 6 for the second foil square. 8. Roll out Play-Doh® into a cylinder of length 10 - 12 cm and a diameter of approximately 10 – 15 mm. Use the Vernier caliper to measure the diameter of the cylinder every two centimeters to check for uniformity. Record the radius in Table 7. 9. Create a circuit by pushing one aluminum foil rod through one end of the cylinder so that the foil rod is perpendicular to cylinder and the ends of the foil stick out of the cylinder (Figure 5). Place the ruler above the cylinder with the aluminum foil rod at the 0 cm mark. 10. Use one alligator clip to connect the aluminum foil rod in the cylinder to the positive end of the battery holder (indicated by a “+” sign). 11. Connect the negative side of the battery holder (indicated by a “-” sign) to the metal probe of the black cord of the multimeter with the second alligator clip. 12. Connect one end of the third alligator clip to the metal part of the red cord. The free end will be used to connect and disconnect the circuit. 13. Turn the dial on the multimeter to “20m” on “DCA” 14. Push the second aluminum foil rod through the far end of the cylinder (the maximum distance) so that the foil rod is perpendicular to the cylinder and the ends of the rod are exposed. 15. Use the ruler to measure the distance between the aluminum foil rods. Record this value in meters in Table 6. Keep this value constant for all areas. © 2014 eScience Labs, LLC.All Rights Reserved16. Complete the circuit by connecting the free alligator clip to the second aluminum foil rod. After about 10 seconds, obtain a quick reading (you don’t want the current to go through the Play-Doh® cylinder for too long). 17. Repeat Step 16 a few more times to make ensure consistent results. If the results are not consistent report the average current for a few trials. Record the current in Table 7 (1 amp = 1000 milliamps). 18. Disconnect both alligator