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

A 20 cm long capillary tube is dipped vertically in water and the liqu

1.	A 20 cm long capillary tube is dipped vertically in water and the liquid rises upto 10 cm. If the entire system is kept in a freely falling platform, the length of water column in the tube will be
Answer» 5 cm 10 cm 15 cm 20 cm Solution :Height of water in the capillary TUBE, `H=(2T)/(R rho g)` Here, T = surface tension of water If the entire system is kept in a freely falling platform, `g=0` But there will be no change in T. `therefore T to oo` So, maximum length of water column in the tube will be 20 cm.