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For a glass tube of diameter d, height of capillarity is given by 
where w = specific weight of liquid
σ = surface tension
θ = angle of contact between liquid and surface
  • a)
  • b)
  • c)
  • d)
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
For a glass tube of diameter d, height of capillarity is given bywhere...
Weight of liquid raised or lowered in the capillary to be
= (area of tube x rise or fall) x specific weight


Vertical component of surface tension force
= σ cosθ x circumference
= σ cosθ x πd = πdσcosθ
In equilibrium, the downward weight of the liquid column h the balanced by the vertical component of the force of surface tension.

Height of capillarity
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For a glass tube of diameter d, height of capillarity is given bywhere w = specific weight of liquidσ= surface tensionθ= angle of contact between liquid and surfacea)b)c)d)Correct answer is option 'B'. Can you explain this answer?
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