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
Temperature coefficient=3.94×10^-3
R2=?
We know
Temperature Coefficient=R2-R1/R1×T
R2= (TC)×R1×T/R1
R2=3.94×10^-3×2.1×72.5/2.1
R2=3.94×10^-3×72.5
=1.99
Therfore, The silver wire has resistant of 1.99 Ω at 100℃
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