Question

Two capillary tubes A and B of diameter $1\, mm$ and $2\, mm$ respectively are dipped vertically in a liquid. If the capillary rise in A is 6 cm, then the capillary rise in B is

• A. 2 cm
• B. 3 cm
• C. 4 cm
• D. 6 cm

Answer 1

Answer: (B)

3 cm

Answer 2

Diameters of capillary tube, $A=1\, mm$
Diameters of capillary tube, $B=2\, mm$
and $h_{1}=6\, m$
We know that, $h_{1} I_{1}=h_{2} I_{2}$
$\Rightarrow 6 \times 1=h_{2} \times 2$
$\Rightarrow$ Capilliary rise in tube $B$,
$h_{2}=\frac{6}{2}=3\, cm$