Question

1. (Target C1) You are a material scientist characterizing a new material. To find electrical properties of the material, you make a cylinder that is 4 cm long and 0.5 cm in diameter. You apply a potential difference across the cylinder and measure the current, obtaining the followinggraph:

-) Does this material obey Ohm's law? Explain your reasoning. If you had only taken data using positive voltages, what would you conclude the resistivityof the material is?

Fig: 1

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Fig: 4