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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a
4 cm
b
20 cm
c
8 cm
d
10 cm
answer is B.
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Detailed Solution
In a freely falling lift geff=0 hence capillary rise is equai to full length of the capillary tube.