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The resistance of a thin silver wire is ...

The resistance of a thin silver wire is `1.0 Omega` at `20^@C`. The wire is placed in a liquid bath and its resistance rises to `1.2 Omega`. What is the temperature of the bath? `alpha` for silver is `3.8xx10^03//(.^(@) C)`

Text Solution

Verified by Experts

Here change in resistance is small so we can apply
`R=R_(0)(1+alphaDeltatheta)`
`rArr" "1.2=1xx(1+10^(-2)Deltatheta)" "rArr" "Deltatheta=20^(underline(o))C`
`rArr" "theta-20=20 rArrtheta=40^(underline(o))C`
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