A silver wire has resistance of 2.1Ω at 27.5 °C. If temperature coefficient of silver is 3.94 x 10⁻³ / °C, find the silver wire resistance at 100 °C.
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Given: R1= 2.1
T1=27.5
T2=100
T=T2-T1 =72.5
Teamperature coefficent =3.94*10-³
R2=?
We know
Teamperature coefficent =R2-R1/R1T
R2=(TC) * R1*T/R1
R2= 3.94*10-³ *2.1*72.5/2.1
= 3.94*10-³*72.5
= 1.99
Therfore the silver wier resistance at 100degree celsius is 1.99ohm
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