Question

Problem 22.28 M ReviewI Constants 1 Periodic Table Part A A rear window defroster consists of a long, flat wire bonded to the inside surface of the window. When current passes through the wire, it heats up and melts ice and snow on the window. For one window the wire has a total length of 12.2 m, a width of 1.6 mm, and a thickness of 0.11 mm. The wire is connected to the cars 12.0 V battery and draws 7.5 A. What is the resistivity of the wire material? Express your answer with the appropriate units. pel Value Units Submit Request Answer Provide Feedback

Answer 1

Resistivity, rho = R A/L = VA/IL

Rho = (12 x 0.0016 x 0.00011)/(7.5 x 12.2) = 2.31 x 10^-8 ohm m

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