Questions
The temperature coefficient of resistance of a wire is .00125°C-1. At 300 K its resistance is one ohm. The asistance of the wire will be 2 ohm at
detailed solution
Correct option is D
R300=R0(1+α×27)=1 Rt=R0(1+α×t)=2∴ 1+27α1+αt=12 or 2+54α=1+αt 2+54(0⋅00125)=1+(0⋅00125)t t=854∘C=1127KTalk to our academic expert!
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A piece of copper and the other of germanium are cooled from the room temperature to 80K, then which of the following would be correct statement?
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