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Water flows through a frictionless duct with a cross-section varying as shown in the figure. Pressure P at points along the axis is represented by:

Option: 1


Option: 2


Option: 3


Option: 4


Answers (1)

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When the cross-section of the duct is decreased, the velocity of water is increased in accordance with Bernoilli's theorem. So, the pressure P is decreased at that place.

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