## In This post you will get answer of Q.

A metallic wire of density d of floats in water. The maximum radius of the wire, so that it may not sink is

Solution:

## The wire does not sink, so net force on it will be zero

$ therefore $ $ mg=T.2l $

$ Rightarrow $ $ {{pi }^{2}}ldg=T.2l $ $ therefore $

$ r=sqrt{frac{2R}{pi dg}} $