First slide

Surface tension

Question

There will be no phenomenon of capillarity if

Moderate

A

The liquid is at its boiling point
B

The liquid is at its freezing point
C

The angle of contact is 90^o
D

Both (1) and (3) are right

Solution

$h = \frac{2 T cosθ}{ρrg}$
h will be zero if either T = 0 i.e., liquid is at its boiling point or when $θ = 90^{o} (\cos 90^{o} = 0)$

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