In a capillary tube, water rises to 3 mm. The height of water that will rise in another capillary tube having one-third radius of the first is:

Options

A. 1 mm
B. 9 mm
C. 3 mm
D. 6 mm

Answer

B

Explanation

For rise in capillary, the formula is,
`h_(1)=(2T)/(r_(1)rhog)`
For second, `h_(2)=(2T)/(r_(2)rhog)`
`(h_1)/(h_2)=(r_2)/(r_1)`
`(3)/(h_2)=(r_1)/(3xxr_1)" "[becauser_(2)=(r_1)/(3)]`
`h_(2)=9mm`