114. When we press the bulb of ink dropper
with its nozzle kept in ink bottle, air in the
dropper is seen to escape in the form of
bubble. Once we release the pressure on
the bulb ink gets filled in the dropper. The
rise of ink in the dropper is due to:
(1)
(2)
(3)
pressure of ink
gravity of the earth
shape of the rubber bulb
(4)
atmospheric pressure
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Answer:
It's because the rubber bulb has air and when we press the bulb the escapes out through the dropper tube. When we release it the ink gets filled with air in the dropper. That's all!!¡¡
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