A) \[2\pi r\,T\,cos\,\theta \]
B) \[2\pi rT\]
C) \[2\pi r\,T\,cos\,\theta +w\]
D) \[2\pi r\,T\,cos\,\theta -w\]
Correct Answer: C
Solution :
When water is depressed downwards at point of contact, then the force due to surface tension acts upwards. Therefore, apparent weight \[=\,\,\,{{F}_{T}}\,\,+ w = 2\pi r T\,cos \theta +\,\,w\]You need to login to perform this action.
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