JEE MAIN - Physics (2005 - No. 30)
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
$$10$$ $$cm$$
$$8$$ $$cm$$
$$20$$ $$cm$$
$$4$$ $$cm$$
Vysvetlenie
In freely falling elevator $$g$$ = 0
Water fills the tube entirely in gravity less condition. Hence, length of water column in the capillary tube is 20 cm.
Water fills the tube entirely in gravity less condition. Hence, length of water column in the capillary tube is 20 cm.