Question

Two capillary tubes of radii 0.2 cm and 0.4 cm are dipped in the same liquid. The ratio of heights through which liquid will rise in the tubes is

• A. 1 : 2
• B. 2 : 1
• C. 1 : 4
• D. 4 : 1

Answer 1

Answer: (B)

2 : 1

Answer 2

$h \propto \frac { 1 } { r }$∴$r _ { 1 } h _ { 1 } = r _ { 2 } h _ { 2 } \Rightarrow \frac { h _ { 1 } } { h _ { 2 } } = \frac { r _ { 2 } } { r _ { 1 } } = \frac { 0.4 } { 0.2 } = 2 : 1$