Properties Of Solids And Liquids Question 188
Question: When a capillary is dipped in water, water rises 0.015 m in it. If the surface tension of water is$ 75\times 10^{3}N/m $ , the radius of capillary is [RPMT 2003]
Options:
A) 0.1 mm
B)0.5 mm
C) 1 mm
D) 2 mm
Show Answer
Answer:
Correct Answer: C
Solution:
$ h=\frac{2T}{rdg} $
therefore $ r=\frac{2T}{hdg}=\frac{2\times 75\times {{10}^{-3}}}{15\times {{10}^{-3}}\times 10^{3}\times 10}=1mm $
