A wire is made from a material having a temperature coefficient of resistivity of 0.00125 (°C)". In an experiment, we maintain a constant potential difference of 120 volts across the wire and measure the power dissipation in it as a function of temperature ; at a temperature of 20° C, the power dissipation is 240 watts. 8. At what temperature (in °C), will the power dissipation in the wire be 60% less than that at 20°C? a. 1820 b. 3220 c. 2420 d. 2820 e. 1220

A wire is made from a material having a temperature coefficient of resistivity of 0.00125 (°C)". In an experiment, we maintain a constant potential difference of 120 volts across the wire and measure the power dissipation in it as a function of temperature ; at a temperature of 20° C, the power dissipation is 240 watts. 8. At what temperature (in °C), will the power dissipation in the wire be 60% less than that at 20°C? a. 1820 b. 3220 c. 2420 d. 2820 e. 1220

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

A wire is made from a material having a temperature coefficient of resistivity of
0.00125 (°C)". In an experiment, we maintain a constant potential difference of
120 volts across the wire and measure the power dissipation in it as a function of
temperature ; at a temperature of 20° C, the power dissipation is 240 watts.
8.
At what temperature (in °C), will the power dissipation in the wire be 60% less
than that at 20°C?
a. 1820
b. 3220
c. 2420
d. 2820
e. 1220

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