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9.1 , fluid mechanics — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysics9.1 , fluid mechanics1 Mark
MCQ
A given shaped glass tube having uniform cross section is filled with water and is mounted on a rotatable shaft as shown in figure. If the tube is rotated with a constant angular velocity $\omega $then
  • ✓
    Water levels in both sections $A$  and $B$ go up
  • B
    Water level in Section $A$  goes up and that in $B$  comes down
  • C
    Water level in Section $A$ comes down and that in $B$  it goes up
  • D
    Water levels remains same in both sections
✓

Answer

Correct option: A.
Water levels in both sections $A$  and $B$ go up
a
(a) Water level in both $A$ and $B$ will go up.

The pressure difference thus created will provide the necessary centripetal force for the water body to rotate around the vertical axis.

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