Question

A 20cm long capillary tube is dipped in water. The water rises up to 8cm. If the entire arrangement is put in a freely falling elevator the length of water column in the capillary tube will be
(a) 4cm 

(b) 20cm 

(c) 8cm 

(d) 10cm

Answer 1

(b) : In a freely falling elevator g = 0 Water will rise to the full length i.e., 20cm to tube.