A silver wire has a resistance of `2.1 Omega` at `27.5^(@)C`, and a resistance of `2.7 Omega` at `100^(@)C`. Determine the temperature coefficient of resistivity of silver.

Explanation

use `R_(t)=R_(0)(1_alpha theta)`
`2.1=R_(0)(1_alpha xx27.5)" ….(1)"`
`2.7=R_(0)(1+alphaxx100)" ….(2)"`
`"Solve equation (1) and (2) "alpha=0.0039^(@)C^(-1)`