Test Academy | Water rises in a capillary tube to a certain height such that the upward force due to surface tension is balanced by 75 x 10⁻⁴ N force due to the weight of the liquid. If the surface tension of water is 6 x 10⁻² N / m, the inner circumference of the capillary must be 1.25 x 10⁻² m, 0.50 x 10⁻² m, 6.5 x 10⁻² m, 12.5 x 10⁻² m

Question

Water rises in a capillary tube to a certain height such that the upward force due to surface tension is balanced by 75 x 10⁻⁴ N force due to the weight of the liquid. If the surface tension of water is 6 x 10⁻² N / m, the inner circumference of the capillary must be

Options :

1.25 x 10⁻² m
0.50 x 10⁻² m
6.5 x 10⁻² m
12.5 x 10⁻² m

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