A) 1.38V
B) 1.68V
C) 2.03V
D) 3.10V
Correct Answer: A
Solution :
When resistance of a wire at \[{{0}^{o}}C\] is \[{{R}_{0}}\] and at\[{{t}^{o}}C\] be \[{{R}_{t}}\], then \[{{R}_{t}}={{R}_{0}}\,(1+\alpha t)\] where \[\alpha \] is a constant called temperature coefficient of resistance of the material of the wire. \[\therefore \] \[133={{R}_{0}}\ (1+150\,\alpha )\] ?. (i) and \[{{R}_{t}}={{R}_{0}}(1+500\,\alpha )\] ... (ii) Hence, \[\frac{133}{{{R}_{t}}}=\frac{1+150\times 0.0045}{1+500\times 0.045}\]
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