(b) A voltage of 3 V is applied across the ends of a copper alloy conductor which has a resistance of 1.5 at room temperature (20 °C). The conductor has a length of 20 m and a diameter of 0.7 mm. (i) (ii) (iii) Calculate the current which flows through the copper alloy conductor and the current density in it. What is the electrical conductivity of the material? After a while, the temperature in the copper alloy conductor rises and its resistance becomes 2.4 №. If the temperature coefficient of resistance of the copper alloy is 0.004/°C at 20 °C, calculate the temperature to which the conductor has risen.

(b) A voltage of 3 V is applied across the ends of a copper alloy conductor which has a resistance of 1.5 at room temperature (20 °C). The conductor has a length of 20 m and a diameter of 0.7 mm. (i) (ii) (iii) Calculate the current which flows through the copper alloy conductor and the current density in it. What is the electrical conductivity of the material? After a while, the temperature in the copper alloy conductor rises and its resistance becomes 2.4 №. If the temperature coefficient of resistance of the copper alloy is 0.004/°C at 20 °C, calculate the temperature to which the conductor has risen.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Question

(b)
A voltage of 3 V is applied across the ends of a copper alloy conductor
which has a resistance of 1.5 at room temperature (20 °C). The
conductor has a length of 20 m and a diameter of 0.7 mm.
(i)
(ii)
(iii)
Calculate the current which flows through the copper alloy
conductor and the current density in it.
What is the electrical conductivity of the material?
After a while, the temperature in the copper alloy conductor rises
and its resistance becomes 2.4 №. If the temperature coefficient of
resistance of the copper alloy is 0.004/°C at 20 °C, calculate the
temperature to which the conductor has risen.

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