Question

Question 10:
When we press the bulb of a dropper with its nozzle kept in water, air in the dropper is seen to escape in the form of bubbles. Once we release the pressure on the bulb, water gets filled in the dropper. The rise of water in the dropper is due to

(a) pressure of water.

(b) gravity of the earth.

(c) shape of rubber bulb

(d) atmospheric pressure
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Answer 1

(d) The rise of water in the dropper is due to atmospheric pressure.

The rise of water in a dropper is due to atmospheric pressure. When all the air escapes from the nozzle, the atmospheric pressure, which is acting on the water, forces the water to fill the nozzle of th

Answer 2

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(d) Atmospheric pressure

The rise of water in the dropper is due to atmospheric pressure.

When the bulb of a dropper is pressed, the pressure inside the dropper decreases and this causes the water to go inside the dropper.