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 $



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