Question

why does resistivity of alloys remain same even on increasing the temperature?​

Answer 1

$\bigstar\sf\pink{Question \::}$

Why does resistivity of alloys remain same even on increasing the temperature?

$\bigstar\sf\pink{Answer \::}$

In metals, the conductivity increases with decrease in temperature and in semiconductors the conductivity increases with increase in temperature but why in alloys (constantan and manganin) the conductivity practically remain the same with increase in temperature.

Answer 2

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In metallic resistance the resistivity of a resistance increase with increase in temperature but alloys have approx negligible temperature coefficient that is the reason why resistivity of alloy resistance remains same that is there is no effect of temperature on alloy resistance