The excess pressure due to surface tension inside a spherical drop is `6 units`. If eight such drops combine, then the excess pressure due to surface tension inside the larger drop is

Options

A. 3 units
B. 6 units
C. 12 units
D. 48 units

Answer

A

Explanation

`8xx(4)/(3)pir^3=(4)/(3)piR^3`,`R=2r`
`(2sigma)/(P)=(2xx2sigma)/(p)` or `P=(p)/(2)=(6)/(2)units=3units`