The resistivity of a metal increases slightly with increased temperature. This can be expressed as p=P[1+a(T-To)], where To is a reference temperature, usually 20°C, and ax is the temperature coefficient of resistivity. Submit ✓ Correct Part B For copper, a = 3.9×10-3°C ¹.Suppose 2.5-m-long, 0.40-mm-diameter copper wire is connected across the terminals of a 1.5 V ideal battery. What is the current in the wire at 20°C? Express your answer with the appropriate units. I= Submit Part C Previous Answers dt Submit HA Value Request Answer What is the rate, in A/C, at which the current changes with temperature as the wire heats up? VE ΑΣΦ Units Request Answer ? QMIC ? A/°C

The resistivity of a metal increases slightly with increased temperature. This can be expressed as p=P[1+a(T-To)], where To is a reference temperature, usually 20°C, and ax is the temperature coefficient of resistivity. Submit ✓ Correct Part B For copper, a = 3.9×10-3°C ¹.Suppose 2.5-m-long, 0.40-mm-diameter copper wire is connected across the terminals of a 1.5 V ideal battery. What is the current in the wire at 20°C? Express your answer with the appropriate units. I= Submit Part C Previous Answers dt Submit HA Value Request Answer What is the rate, in A/C, at which the current changes with temperature as the wire heats up? VE ΑΣΦ Units Request Answer ? QMIC ? A/°C

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter1: Temperature And Heat

Section: Chapter Questions

Problem 96P: A warms transfers energy by conduction through its blubber at the rate of 150 W when immersed in ...

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afcopper whe (aae.0068) is conneeteed to a 12 volt batt ery at z08 aned contaret cuttent ef aýs A at pew temperatute the same wive contacts a cuYtent ofO.41A (A)is the new bempera ture. than 20°C (3) what the new tepmperature. highel ex Lower
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