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9.2 , surface tension — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysics9.2 , surface tension1 Mark
MCQ
Water rises in a vertical capillary tube upto a height of $2.0\  cm$. If the tube is inclined at an angle of $60^o$ with the vertical, then upto what length the water will rise in the tube...... $cm$
  • A
    $2.0$
  • ✓
    $4.0$
  • C
    $\frac{4}{{\sqrt 3 }}$
  • D
    $2\sqrt 2$
✓

Answer

Correct option: B.
$4.0$
b
$l = \frac{h}{{\cos \theta }} = \frac{2}{{\cos {{60}^o}}} = 4.0\ cm$

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