Properties Of Solids And Liquids Question 383
Question: A 10 cm long wire is placed horizontally on the surface of water and is gently pulled up with a force of $ 2\times {{10}^{-2}}N $ to keep the wire in equilibrium. The surface tension, in$ N{{m}^{-1}} $ , of water is [AMU (Med.) 1999]
Options:
A) 0.1
B)0.2
C) 0.001
D) 0.002
Show Answer
Answer:
Correct Answer: A
Solution:
$ T=\frac{F}{2l}=\frac{2\times {{10}^{-2}}}{2\times 10\times {{10}^{-2}}}=0.1\ N/m $
