Question

in the figure alongside the ink does not fall out of the dropper a) the atmospheric pressure outside is more.B)the pressure inside the dropper is more. C) the pressure inside and outside of the dropper is equal. D) the pressure inside the dropper is less

Answer 1

The correct answer is options a and d - a) the atmospheric pressure outside is more and D) the pressure inside the dropper is less.

As the ink dropper is pressed, a lower pressure is created and it sucks the ink due to the ink dropper. After entering into the dropper, the ink will be present at the lower pressure than the outside atmospheric pressure. Liquids like ink cannot flow from lower pressure to the higher pressure. Thus, the ink remains inside the ink dropper without dropping unless more pressure is applied to it by pressing its rubber.

Answer 2

Well, according to the options you provided there are 2 option true here both option 1(the atmospheric pressure outside is more) as well as the option 4 (the pressure inside the dropper is less) are correct.

This is because when the dropper sucks the ink there is creation of lesser pressure happen inside the dropper , this pressure is actually lesser than the atmospheric area outside  . As the ink can't go from the area of low pressure towards the high pressure so don't fall out of the dropper.