TS EAMCET · Physics · Current Electricity
A wire has resistance of \(3.1 \Omega\) at \(30^{\circ} \mathrm{C}\) and \(4.5 \Omega\) at \(100^{\circ} \mathrm{C}\). The temperature coefficient of resistance of the wire is
- A \(0.008^{\circ} \mathrm{C}^{-1}\)
- B \(0.0024^{\circ} \mathrm{C}^{-1}\)
- C \(0.0032^{\circ} \mathrm{C}^{-1}\)
- D \(0.0064^{\circ} \mathrm{C}^{-1}\)
Answer & Solution
Correct Answer
(A) \(0.008^{\circ} \mathrm{C}^{-1}\)
Step-by-step Solution
Detailed explanation
Given, \[ \begin{aligned} & t_1=30^{\circ} \mathrm{C} \\ & R_1=3.1 \Omega \\ & t_2=100^{\circ} \mathrm{C} \\ & R_2=4.5 \Omega \end{aligned} \] We know that, Temperature coefficient of resistance,…
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