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  • A 10 cm long wire is placed horizontallyon the surface of water and is gently pulled up with a force of <img alt="2 \times 10^{2}N" src="https://entrancecorner.oncodecogs.com/gif.latex?2%20%5C

A 10 cm long wire is placed horizontallyon 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  \frac{N}{m}  of water is:

Option: 1

0.1


Option: 2

0.2


Option: 3

0.001


Option: 4

0.002


Answers (1)

best_answer

Use, T= \frac{F}{2l} = \frac{2 \times 10^{-2}}{2 \times 10\times 10^{-2}}

         T = \frac{1}{10}

        T = 0.1 \frac{N}{m}

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