Question

Water rises to a height of $2cm$ in a capillary tube held vertically. When the tube is tilted ${60}^o$ from the vertical, the length of the water column in the tube will be

• A. $1cm$
  
• B. $2cm$
  
• C. $3cm$
  
• D. $4cm$
  

Answer 1

The correct option is D $4cm$

Since vertical rise in capillary tube remains constant.

$lcos{60}^0=h$

$l=2h=2\times 2cm=4cm$