4) Gold wireAl = 10 m long cylindrical wire made of gold (resis-tivity pAu = 2.44 × 10¬8 Nm at To = 20° C, temperaturecoefficient aAu = 3.4 x 10-3 (°C)¯) has a resistance ofR = 12.a: What is the radius r of the wire?b: If the wire is twice as long, the radius is ...1. twice as big O 2. 2 larger O 3. a fourth Oc: What is the resistance of the wire at T1000° C?%3D

Length (l) = 10 m resistivity (ρ) = 2.44×10-8 ohm.meter T = 20oC αAu = 3.43×10-3 (C-1) R = 1 ohm

Al = 10m long cylindrical wire made of gold (resis- tivity pAu = 2.44 × 10¬* N m at To = 20° C, temperature coefficient aAu = 3.4 x 10-3 (°C)¯') has a resistance of R= 12. %3D 8 a: What is the radius r of the wire? b: If the wire is twice as long, the radius is ... 1. twice as big O 2. V2 larger O 3. a fourth O c: What is the resistance of the wire at T = 1000° C?

Al = 10m long cylindrical wire made of gold (resis- tivity pAu = 2.44 × 10¬* N m at To = 20° C, temperature coefficient aAu = 3.4 x 10-3 (°C)¯') has a resistance of R= 12. %3D 8 a: What is the radius r of the wire? b: If the wire is twice as long, the radius is ... 1. twice as big O 2. V2 larger O 3. a fourth O c: What is the resistance of the wire at T = 1000° C?

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 42P: What current flows through a 2.54-cm-diameter rod of Pure silicon that is 20.0 cm long, when 1.00103...

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