The resistivity of a metal increases slightly with increased temperature. This can be expressed as P= Po|1 + a(T-To) where To is a reference temperature, usually 20°C, and is the temperature coefficient of relativity PartA First find an expression for the current I through a wire of length L. cross-section area A. and temperature T when connected across the terminals of an ideal battery with terminal voltage AV. Then, because the change in resistance is small, use the binomial approximation to simplify your expression. Your final expression should have the temperature coefficienta in the numerator Express your answer in terms of L. A.T.T. AV, and a View Available Hint(s) 1. Submit Part B τύπ ▾ Part C ΑΣΦ For copper-3.9x10C-Suppose 25-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. View Available Hint(s) Submit T VÀ Đ Value A 013? ? Units What is the rate in A/C, at which the current changes with temperature as the wire heats up? View Available Hint(s) Η ΑΣΦ 013? A/C

The resistivity of a metal increases slightly with increased temperature. This can be expressed as P= Po|1 + a(T-To) where To is a reference temperature, usually 20°C, and is the temperature coefficient of relativity PartA First find an expression for the current I through a wire of length L. cross-section area A. and temperature T when connected across the terminals of an ideal battery with terminal voltage AV. Then, because the change in resistance is small, use the binomial approximation to simplify your expression. Your final expression should have the temperature coefficienta in the numerator Express your answer in terms of L. A.T.T. AV, and a View Available Hint(s) 1. Submit Part B τύπ ▾ Part C ΑΣΦ For copper-3.9x10C-Suppose 25-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. View Available Hint(s) Submit T VÀ Đ Value A 013? ? Units What is the rate in A/C, at which the current changes with temperature as the wire heats up? View Available Hint(s) Η ΑΣΦ 013? A/C

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 46P: An electronic device designed to operate at any temperature in the range from 10.0C to 55.0C...

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