A) \[0.013/{}^\circ C~\]
B) \[0.004/{}^\circ C\]
C) \[0.006/{}^\circ C\]
D) \[0.008/{}^\circ C\]
Correct Answer: A
Solution :
[a] \[[\text{Hint}\Rightarrow {{R}_{t}}={{R}_{0}}(1+\alpha t)]\] \[5\Omega ={{R}_{0}}\left( 1+\alpha \times 50 \right)\text{ and 7}\Omega ={{R}_{0}}\left( 1+\alpha \times 100 \right)\] \[\text{or }\frac{5}{7}=\frac{1+50\alpha }{1+100\alpha }\text{ or }\alpha =\frac{2}{150}=0.0133/{}^\circ C\]
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