A 20 cm long capillary tube is dipped ve...

A 20 cm long capillary tube is dipped vertically in water and the liquid rises upto 10 cm. If the entire system is kept is a freely falling platform, the length of the water column in the tube will be

5cm

10cm

15cm

20cm

Text Solution

Verified by Experts

The correct Answer is:

Capillary rise in an accelerated lift used as a plateform,
`h = (2S cos theta)/(r rho a_(eff))`
Here ` a_(eff) = 0` (for freely falling plateform)
` therefore h=oo`
It means length of water column in the tube will be 20 cm.

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