Question

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

• A. 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 remain same in both sections

Answer 1

Answer: (A)

Water levels in both sections A and B go up

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.