Properties Of Solids And Liquids Question 246

Question: The maximum force, in addition to the weight required to pull a wire of 5.0 cm long from the surface of water at temperature $ 20{}^\circ C $ is 728 dynes. The surface tension of water is

Options:

A) $ 7.28N/cm $

B) $ 7.28dyne/cm $

C) $ 72.8dyne/cm $

D) $ 7.28\times 10^{2}dyne/cm $

Show Answer

Answer:

Correct Answer: C

Solution:

[c] $ T=\frac{F}{2l}=\frac{728}{2\times 5} $

$ \therefore T=72.8dyne/cm $



जेईई के लिए मॉक टेस्ट

एनसीईआरटी अध्याय वीडियो समाधान

दोहरा फलक