1 and 2 March 31, 2022 at 10:19 AM1. An unknown alloy is subjected to an electric field of 25 V/m, and has a current density of 1.45 X 10 9 A/m2.What is the metal's resistivity?2. A copper-nickel alloy called constantan has a resistance of 8.55 X 10 4 mQ at 20.0 °C. What is its resistanceif it is subjected to a temperature of 1500.0 °C? Assume that Equation for resistance is applicable at veryhigh temperature change.3. The temperature dependence of metal makes it possible for it to be used as a resistance thermometer, whichinvolves platinum. Platinum has a resistance of 50.0 0 at 20.0 °C. When it is immersed in a melting metalindium, its resistance increases to 7.68 X 10 4 mn. What is the melting point of indium in Kelvin?

Answer:- Given Electric field (E) = 25 V/m Current density (J) = 1.45 × 109 A/m2 Resistivity (p)…

March 31, 2022 at 10:19 AM 1. An unknown alloy is subjected to an electric field of 25 V/m, and has a current density of 1.45 X 10 9 A/m2. What is the metal's resistivity? 2 A cor per nickel alloy called conctantan bac g cocictan ce of 8 55Y 10 A moat 20.0 9C What ic ite rocictance

March 31, 2022 at 10:19 AM 1. An unknown alloy is subjected to an electric field of 25 V/m, and has a current density of 1.45 X 10 9 A/m2. What is the metal's resistivity? 2 A cor per nickel alloy called conctantan bac g cocictan ce of 8 55Y 10 A moat 20.0 9C What ic ite rocictance

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 55P: A 20.00-V battery is used to supply current to a 10-k resistor. Assume the voltage drop across any...

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