A) \[\sqrt{\frac{1}{\rho }}\]
B) \[\frac{3}{\sqrt{\rho }}\]
C) \[\frac{\sqrt{3}}{\rho }\]
D) \[\rho \sqrt{\frac{1}{3}}\]
E) None of these
Correct Answer: B
Solution :
Volume \[=Al=3\] \[A=\frac{3}{l}\] Now, \[R=\rho \frac{l}{A}\] \[3=\frac{\rho \times l}{3/l}\] \[{{l}^{2}}=\frac{9}{\rho }\] \[\Rightarrow \] \[l=\frac{3}{\sqrt{\rho }}\]You need to login to perform this action.
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