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Question : Electrical conductance through metals is called electronic conductance and it ______.

Option 1: does not depend on the temperature

Option 2: decreases with an increase in temperature

Option 3: increases with an increase in temperature

Option 4: decreases with a decrease in temperature


Team Careers360 7th Jan, 2024
Answer (1)
Team Careers360 9th Jan, 2024

Correct Answer: decreases with an increase in temperature


Solution : The correct answer is decreases with an increase in temperature.

When the material is heated, more and more of the loosely bound carriers escape and become free to conduct. Once all of the soon-to-be-mobile carriers in a semiconductor are fully activated, it behaves like a metal and additional temperature rises cause it to lose conductivity. The resistivity of metals normally increases with temperature, whereas the resistivity of semiconductors often decreases with temperature.

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