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Why are constantan and manganin used for...

Why are constantan and manganin used for making standard resistances ?

A

temperature independent resistivity

B

very weak temperature dependent resistivity

C

strong dependence of resistivity with temperature

D

mechanical strength

Text Solution

Verified by Experts

The correct Answer is:
B
These material exhibit a very weak dependence of resistivity on temperature. Their resistance value would be changed very little with temperature as shown in figure. Hence these materials are widely used as heating element.
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