1.

The work done to split a liquid drop id radius `R` into `N` identical drops is (taken `sigma` as the surface tension of the liquid)A. `4piR^(2)(N^(-1//3)-1)sigma`B. `4piR^(2)N sigma`C. `4piR^(2)(N^(-1//2)-1)`D. None of these

Answer» Correct Answer - A
`N((4)/(3) pir^(3))=(4)/(3) piR^(3)`
`:. r=R((1)/(N))^(1//3)`
`W=sigma (Delta A)`
`= sigma (A_(f)-A_(i))`
`=sigma [N(4 pi r^(2))- 4 pi R^(2)]`
`=4 pi sigma [NR^(3)((1)/(N))^(2//3)-R^(2)]`
`=4sigma pi R^(2) (N^(-1//3)-1)`.


Discussion

No Comment Found

Related InterviewSolutions