If the radius of the opening of the dropper is

PHYSICS · Single correct · CBSE · Physics · Mechanical Properties of Fluids · Mechanical Properties of Fluids

Problem

r

, the vertical force due to the surface tension on the drop of radius

R

(assuming

r \ll R

) is (1)

2\pi rT

(2)

2\pi RT

(3)

\frac{2\pi r^2 T}{R}

(4)

\frac{2\pi R^2 T}{r}