A) \[\frac{3}{2}\]
B) \[\frac{2}{3}\]
C) \[\frac{5}{2}\]
D) \[\frac{2}{5}\]
Correct Answer: A
Solution :
For parallel combination of two rods of equal length and equal area of cross-section. \[k=\frac{{{k}_{1}}+{{k}_{2}}}{2}\,\,=\,\,\frac{{{k}_{1}}+2{{k}_{1}}}{2}\] \[\Rightarrow \,\,\,\,\,\,\,\,\,\,\,\,\,k\,\,=\,\,\frac{3{{k}_{1}}}{2}\] \[\Rightarrow \,\,\,\,\,\,\,\,\,\,\,\,\,\frac{k}{{{k}_{1}}}\,\,=\,\,\frac{3}{2}\]You need to login to perform this action.
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