Question

When a capillary tube is lowered into water,the mass of the water raised above the outside level is 5 gm. If the radius of the tube is doubled, the mass of water that raises in the tube above the outside level is:

• A. 1.25 gm
• B. 5 gm
• C. 10 gm
• D. 20 gm

Answer 1

The correct option is C 10 gm

When a capillary tube is lowered, the water outside it is raised due to more volume of tube inserted in it. If the radius is doubled , then the periphery of tube is also doubled, doubling its volume.

$\therefore$ water rising outside, hence, is 10 gm.