Question

A dropper to fill ink work because of which of the following?
a.friction
b.magnetic force
c.air pressure
d.electrostatic force
​

Answer 1

A dropper which is used to fill ink works on the difference of air pressure.

Option c

Explanation:

• While the dropper is pressed there is a Decrease in the surface area inside the dropper.
• As a result of this there is decrease in the air pressure inside the dropper. As the liquid moves from a region of higher pressure to the region of lower pressure there is movement of the ink from the container which is comparatively at higher air pressure to the inside of the plunger to which is at lower pressure even against the gravity

To know about,

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Answer 2

Answer:

electrostatic force

is correct