First slide

Surface tension and surface energy

Question

When two capillary tubes of different diameters are dipped vertically, the rise of the liquid is

Moderate

A

Same in both the tubes
B

More in the tube of larger diameter
C

Less in the tube of smaller diameter
D

More in the tube of smaller diameter

Solution

$h = \frac{2 Tcos θ}{rdg} ∴ h \propto \frac{1}{r} (T, θ, d and g are constant)$
If r is less then h will be more.

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