5 6 7 8 9 10 Part b: Explore how the area affects the resistance Measure the battery voltage and record the value in the following table. Now set up the multimeter as a current meter. Using the entire can of Play-Doh™, roll out a Play-Doh™ cylinder that is 10 cm long. Take care to keep the cross-sectional area as uniform as possible. Measure the diameter of the Play-Doh™ resistor and record it in the table. Connect the circuit as shown in the figure below, with the exception of the Play-Doh™ resistor. Play-Doh™ resistor or equivalently using A circuit diagrams Push the metal rods about 1 cm into the center of each end of your Play-Doh™ resistor, read the current. between measurements. Disconnect the circuit immediately Record the current value in the table on the next page. Cut your cylinder in half and put the extra Play-Doh™ back in the container to keep it moist. Roll out the remaining Play-Doh™ so that it is again uniform in cross-section and10 cm long. Measure the diameter and record the data in the Measure the current, disconnect the circuit immediately, and record the data. Repeat this process one more time, so you now are about ¼ of the original amount of Play-Doh™. Using Ohm’s law, calculate the values for the resistance and fill in the table below. Effect of Cross-sectional Area on Resistance (Resistor length = ~10 cm)
5 6 7 8 9 10 Part b: Explore how the area affects the resistance Measure the battery voltage and record the value in the following table. Now set up the multimeter as a current meter. Using the entire can of Play-Doh™, roll out a Play-Doh™ cylinder that is 10 cm long. Take care to keep the cross-sectional area as uniform as possible. Measure the diameter of the Play-Doh™ resistor and record it in the table. Connect the circuit as shown in the figure below, with the exception of the Play-Doh™ resistor. Play-Doh™ resistor or equivalently using circuit diagrams A Push the metal rods about 1 cm into the center of each end of your Play-Doh™ resistor, read the current. Disconnect the circuit immediately between measurements. Record the current value in the table on the next page. Cut your cylinder in half and put the extra Play-Doh™ back in the container to keep it moist. Roll out the remaining Play-Doh™ so that it is again uniform in cross-section and10 cm long. Measure the diameter and record the data in the Measure the current, disconnect the circuit immediately, and record the data. Repeat this process one more time, so you now are about ¼ of the original amount of Play-Doh™. Using Ohm’s law, calculate the values for the resistance and fill in the table below. Effect of Cross-sectional Area on Resistance (Resistor length = ~10 cm)
Nature%20of%20Resistance%20May%202015.docx