A) \[\sqrt{\frac{1}{\rho }}\]
B) \[\frac{3}{\sqrt{\rho }}\]
C) \[\frac{1}{\rho }\,\,\sqrt{3}\]
D) \[\rho \sqrt{\frac{1}{3}}\]
Correct Answer: C
Solution :
\[Volume\,=\,\,A1\,\,=\,\,3\,\,\,\,\,\Rightarrow \,\,\,\,A=\frac{3}{l}\] Now \[R=\rho \frac{l}{A}\,\,\,\,\,\,\Rightarrow \,\,\,\,\,\,3=\frac{\rho \times l}{3/l}\,\,=\,\,\frac{\rho {{l}^{2}}}{3}\] \[\Rightarrow \,\,\,\,\,\,\,\,\,\,{{l}^{2}}=\frac{9}{\rho }=\frac{3}{\sqrt{\rho }}\]You need to login to perform this action.
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