Question

If the surface tension of water is ` 7.3 xx 10^(-2)` N/m then the excess pressure inside a spherical drop of water of radius ` 1 xx 10^(-3)` m formed will be
A. `14.6 N//m^(2)`
B. `146 N//m^(2)`
C. `1460 N//m^(2)`
D. ` 14600 N//m^(2)`

Answer 1

Correct Answer - B
` P = (2T)/r = (2 xx 7. 3 xx 10^(-2))/(1 xx 10^(-3)) = 146 " N/m"^(2)`