The following observations were taken for determining surface tension T of water by capillary method: diameter of capillary, D = 1.25 … 10⁻² m rise of water, h = 1.45 … 10⁻²m Using g = 9.80 m/s² and the simplified relation T = …, the possible error in surface tension is closest to :

Units and Measurements

JEE Main 2017 · Session, Shift 1 · Q8291

PhysicsMedium156×since 2002Q8291

The following observations were taken for determining surface tension T of water by capillary method: diameter of capillary, D = 1.25

\times

10⁻² m rise of water, h = 1.45

\times

10⁻²m Using g = 9.80 m/s² and the simplified relation T =

{{rhg} \over 2} \times {10^3}N/m

, the possible error in surface tension is closest to :