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 dropper. The rise of water in the dropper is due to
A
Pressure of water
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B
Gravity of the earth
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C
Shape of rubber bulb
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D
Atmospheric pressure
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Solution
The correct option is D Atmospheric pressure The rise of water in the dropper is due to the pressure difference between inside and outside of the tube. hence, The rise of water in the dropper is due to atmospheric pressure.