dianacastro8298
10.01.2021 •
Physics
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Ответ:
The correct answer is a cool lead metal strip.
Explanation:
Conductivity is defined as the material's extent to allow an electric current to flow through it. It is inversely related to the temperature.
With increase in temperature, the conductivity decreases.
From the given options:
Option 1: A warm plastic rodPlastic rod is an insulator and hence, we will not have conductivity.
Option 2: A cool rubber tubeRubber tube is an insulator and hence, we will not have conductivity.
Option 3: A cool lead metal stripLead metal strip is a conductor and it will show conductivity and its conductivity will be high because the temperature is low.
Option 4: A warm copper wireCopper wire is a conductor and it will show conductivity but its conductivity will be less because the temperature of the material is high.
Hence, the correct answer is Option 3.