Question

Two capillaries made of same material but of different radii are dipped in a liquid. The rise of liquid in one capillary is 2.2cm and that in the other is 6.6cm. The ratio of their radii is

• A. 9 : 1
• B. 1 : 9
• C. 3 : 1
• D. 1 : 3

Answer 1

Answer: (C)

3 : 1

Answer 2

As $h \propto \frac{1}{r}$ $\therefore\frac{h_{1}}{h_{2}} = \frac{r_{2}}{r_{1}}$ or $\frac{r_{1}}{r_{2}} = \frac{h_{2}}{h_{1}} = \frac{6.6}{2.2} = \frac{3}{1}$SS