HW #4 - Current &amp;amp; Conductivity

# HW #4 - Current &amp;amp; Conductivity -...

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MasteringPhysics: Assignment Print View A Few Bumps on the Road Learning Goal: To learn to apply the microscopic theory of conduction. A gauge-12 wire has diameter centimeters and length meters. When the voltage volts is applied to the ends of the wire, the current is amperes. The concentration of free electrons in the wire is per cubic meter. Part A Find the resistivity of the wire. Hint A.1 Hint not displayed Hint A.2 Hint not displayed Part A.3 Part not displayed Part A.4 Part not displayed Express your answer in ohm-meters. Use two significant figures. ANSWER: = 2.75×10 - 8 Part B Find the mean time between electron collisions in the wire. Hint B.1 Hint not displayed Hint B.2 Hint not displayed Hint B.3 Hint not displayed Express your answer in seconds. Use two significant figures. ANSWER: = 2.20×10 - 14

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MasteringPhysics: Assignment Print View Problem 28.1

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