2. Solved Papers
  3. RAJASTHAN PMT

RAJASTHAN PMT Rajasthan - PMT Solved Paper-1995

  • question_answer
    Surface tension force on water rised in capillary tube is balanced by force \[72\times {{10}^{-6}}N\]   acting   in   downward direction due to weight of water. If surface tension of water is 0.06 N/m. Then internal circumference of capillary tube is:

    A)  0.5 mm                               

    B)         1 mm                   

    C)         1.2 mm                               

    D)         1.75 mm

    Correct Answer: D

    Solution :

    For water \[T=\frac{mg}{2\pi r}\] \[r=\frac{mg}{2\pi T}=\frac{72\times {{10}^{-6}}}{2\times 3.14\times 0.06}\] \[=1.75mm\]


You need to login to perform this action.
You will be redirected in 3 sec spinner