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The resistance of platinum wire at \(0^{\circ} \mathrm{C}\) is \(2 \Omega\) and 6.8 \(\Omega\) at \(80^{\circ} \mathrm{C…

Q1

The resistance of platinum wire at \(0^{\circ} \mathrm{C}\) is \(2 \Omega\) and 6.8 \(\Omega\) at \(80^{\circ} \mathrm{C}\). The temperature coefficient of resistance of the wire is :

a

\(3\times {10}^{-3}{{}^{∘}\mathrm{C}}^{-1}\)

b

\(3\times {10}^{-2}{{}^{∘}\mathrm{C}}^{-1}\)

c

\(3\times {10}^{-1}{{}^{∘}\mathrm{C}}^{-1}\)

d

\(3\times {10}^{-4}{{}^{∘}\mathrm{C}}^{-1}\)

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