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TS EAMCET 5-Aug-2021 Shift 1 Question Paper

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Question : 96

Total: 160

A metal sheet 4 cm on a side and of negligible thickness is attached to a balance and inserted into container fluid. The balance to which metal sheet is attached read 0.50 N and the contact angle is found to be zero. A small amount of oil is thenspread over the metal sheet. The contact angle now becomes 180° and the balance now reads 0.49 N. The surface tension of the field is

6.25×10−2 N/m
1.25×10−1 N/m
4.25×10−2 N/m
0.1 N/m

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