| Nidhi pushed the plunger of syringe completely and dipped its needle in water. |
| Then she slowly pulled the plunger while its needle was still immersed in water. Select the correct option regarding this. |
A) Water will move in the syringe when she pushed the plunger down due to air pressure.
B) When she pushed the plunger down all the air moved out creating an empty space in syringe.
C) Air outside the syringe exerted pressure on water causing it to move in when the plunger is pulled up.
D) Both (b) and (c)
Correct Answer: D
Solution :
When plunger is pushed down, the air inside the syringe is pushed out, creating an empty space. When the plunger is pulled up the water rushes up to take the empty space due to the air pressure acting on it outside the syringe.
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