how does the an alloy such as constantan of a semiconductor vary with temperature?
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Constantan is a copper -Mickelson alloy also known as Eureka , Advance , and Ferry . It usually consists of 55% copper and 45 % nickel.
Its main features is the low thermal variation of its resistivity which is constant over a wide range of temperature.
In semiconductor, restitution decreases with rise in the temperature . As the temperature increased the number of free charge carries are increased due to breaking of more and more covalent bonds . Hence , it's conductivity increases and resistivity decreases with an temperature.
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