A silver wire has a resistance of `2.1 Omega 27.5^(@)C Omega` and a resistance of `2.7Omega "at" 100^(@)C`. Determinethe temperature co-efficient of resistance of the silver.

Explanation

`R_(1)=2.1Omega,T_(1)=27.5^(@)C" " R_(2)=2.7Omega,T_(2)=100^(@)C`
`prop=(R_(2)-R_(1))/(R_(1),DeltaT)=(2.7-2.1)/(2.1(100-27.5))=0.0039^(@)C^(1)`