| STATEMENT - 1 |
| The temperature dependence of resistance is usually given as\[R={{R}_{0}}(1+\alpha \,\,\Delta t)\]. The resistance of a wire changes from\[100\,\Omega \]to \[150\,\Omega \] when its temperature is increased from \[27{}^\text{o}C\] to \[227{}^\text{o}C.\] This implies that\[\alpha =2.5\]\[\times {{10}^{3}}/{}^\text{o}C.\] |
| STATEMENT - 2 \[R={{R}_{0}}(1+\alpha \text{ }\Delta t)\]is valid only when the change in the temperature \[\Delta T\] is small and\[\Delta R=(R{{R}_{0}})<<{{R}_{0}}.\] [AIEEE 2009] |
A) Statement - 1 is True, Statement - 2 is False.
B) Statement - 1 is True, Statement - 2 is True; Statement - 2 is a correct explanation for Statement - 1.
C) Statement - 1 is True, Statement - 2 is True; Statement - 2 is not the correct explanation for Statement - 1.
D) Statement - 1 is False, Statement - 2 is True.
Correct Answer: D
Solution :
[d] \[{{R}_{0}}\]is the resistance at\[0{}^\text{o}C.\]
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