The rise of liquid of specific weight $γ$ in a capillary tube of radius r is given by

[ $σ$ = surface tension of the liquid ]

- 1
  
  $\frac{σ}{2 r γ}$
- 2
  
  $\frac{2 σ}{r}$
- 3
  
  $\frac{2 σ}{r γ}$
- 4
  
  $\frac{γ σ}{2 r}$

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