Properties Of Solids And Liquids Question 185
Question: Radius of a capillary is $ 2\times {{10}^{-3}}m. $ A liquid of weight $ 6.28\times {{10}^{-4}}N $ may remain in the capillary then the surface tension of liquid will be [RPET 2003]
Options:
A) $ 5\times {{10}^{-3}}N/m $
B) $ 5\times {{10}^{-2}}N/m $
C) $ 5N/m $
D)$ 50N/m $
Show Answer
Answer:
Correct Answer: B
Solution:
$ T=\frac{F}{2\pi r}=\frac{6.28\times {{10}^{-4}}}{2\times 3.14\times 2\times {{10}^{-3}}}=5\times {{10}^{-2}}N/m $
