JEE Main | 2016Alcohol, Phenol and EtherHard

Question

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 × 10–2 m.
Using g = 9.80 m/s2 and the simplified relation
T=rhg2×103 N/m, the possible error in surface tension is closest to

Options

A.

0.15%

B.

1.5%

C.

2.4 %

D.

10 %

Solution

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