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While measuring surface tension of water using capillary rise method, height of the lower meniscus from free surface of water is `3cm` while inner radius of capillary tube is found to be `0.5cm`. Then compute surface tension of water using this data. (Take contact angle between glass and water as `0^(@)` and `g=9.8lms^(-2)`)A. `0.72Nm^(-1)`B. `0.77Nm^(-1)`C. `1.67Nm^(-1)`D. `8.67Nm^(-1)`

Answer» Correct Answer - B
`((h+(r )/(3))rdg)/(2costheta)`


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