A 20 cm long capillary tube is dipped, in water. The water rises upto 8 cm. If the entire arrangement is put in a freely falling elevator, the length of water column in the capillary tube will be
AIEEE Solved Paper-2005
A)8cm
B) 10cm
C) 4cm
D) 20cm
Correct Answer:
D
Solution :
As lift accelerates downward, the liquid will rise under psuedo forcecontinously acting in upward directions. So, liquid will rise upto entire length of the tube. (during free fall)