A) \[1\times {{10}^{-4}}{{\,}^{o}}{{C}^{-1}}\]
B) \[5\times {{10}^{-4}}{{\,}^{o}}{{C}^{-1}}\]
C) \[2\times {{10}^{-4}}{{\,}^{o}}{{C}^{-1}}\]
D) \[0.5\times {{10}^{-4}}{{\,}^{o}}{{C}^{-1}}\]
Correct Answer: C
Solution :
We know that resistance \[R=\frac{V}{i}=\frac{220}{2}={{R}_{o}}(1+\alpha \Delta t)\] Also\[{{R}_{o}}\]is given as\[100\Omega \] Putting\[\Delta T=500\,K\] We get\[\alpha =2\times {{10}^{-4}}\]
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