why are constantan and manganin used for making standard resistances?
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It is because they have a high value of specific resistance along with virtually zero temperature coefficient.
dint understand
pls explain in simple terms
Same answer as mine, basically a lower temperature coefficient means, practically no change in resistance even with huge variation with temperature.
ok thanks
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Explanation: This is because Constantan and manganin have realtively very low temperature coefficient of resistance, α. Due to this, even at high temperatures their resistance pretty much remains unchanged unlike other metals whose resistance increase with temperature.
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