The diagram shows a cup of tea seen from above. The tea has been stirred and is now rotating without turbulence. A graph showing the speed $V$ with which the liquid is crossing points at a distance $X$ from $O$ along a radius $X O$ would look like

diagram

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Solution

The correct option is B diagram
We know that $\frac{d v}{d z} = η A$
When we move from to circumference, the velocity of liquid goes on decreasing and finally become zero.
Final Answer: $(d)$

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