A 20 cm long capillary tube is dipped in water. The water rises up to 8 cm. If the entire arrangement is put in a freely falling elevator, the length of water column in the capillary tube will be

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ext{ Height of water column in capillary tube is given by: } h = 2Tcosθ/rho g 	ext{ A free falling elevator experiences zero gravity }. \Rightarrow h = 2Tcosθ/rho0 = \infty 	ext{ But, h = 20 cm (given)} 	ext{ Therefore, the height of the water column will remain at a maximum of 20 cm} .

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