A) 8N/m
B) 0.250N/m
C) 0.125N/m
D) 0.2N/m
Correct Answer: C
Solution :
[c] \[{{A}_{1}}=8\times {{10}^{-4}}{{m}^{2}}{{A}_{2}}=20\times {{10}^{-4}}{{m}^{2}}\] \[W=3\times {{10}^{-4}}J\,\] \[W=2T\Delta A\] [?2? thin film has two surfaces] \[3\times {{10}^{-4}}=2.T.\,[20\times {{10}^{-4}}\,-8\times {{10}^{-4}}]\] \[3\times {{10}^{-4}}\,24T\times {{10}^{-4}}\] \[T=0.125N/m\]You need to login to perform this action.
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