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  • When a wire of length I and cross- sectional radius r(r<<l) is kept floating on surface of a liquid. Find maximum radius of wire so that it may not sink. surface tension of liquid is T.<d

When a wire of length I and cross- sectional radius r(r<<l) is kept floating on surface of a liquid. Find maximum radius of wire so that it may not sink. surface tension of liquid is T.

Option: 1

\sqrt{\frac{T}{\pi \rho g}}


Option: 2

\sqrt{\frac{3T}{\pi \rho g}}


Option: 3

\sqrt{\frac{2T}{\pi \rho g}}


Option: 4

\sqrt{\frac{T}{2\pi \rho g}}


Answers (1)

best_answer

use,\ mg = 2Tl

\begin{gathered} \left(\rho \pi r^2 l\right) g=2 T l \\ r=\sqrt{\frac{2 T}{\pi \rho g}} \end{gathered}

 

 

Posted by

Pankaj

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