MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Formula for Water Potential

When water fa...

Question

When water falls from a tap the velocity of falling water under the action of gravity will increase and the cross section of the water stream will decrease i.e., the falling stream of water becomes narrower.It is based on :

A

Principle of continuity

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

B

Bernoullis theorem

No worries! We‘ve got your back. Try BYJU‘S free classes today!

C

Law of conservation of energy

No worries! We‘ve got your back. Try BYJU‘S free classes today!

D

Law of conservation of linear momentum.

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B Principle of continuity
According to principle of continuity : $A v = c o n s t a n t$
Thus decreasing the cross section area of the water stream will increase the velocity of water stream.

Suggest Corrections

thumbs-up

0

Similar questions

Q. Figure shows a stream of water emerging from the opening of a tap. As the water falls through a height

h = P Q

, the cross-sectional area of the stream decreases from

A

a

. Obtain the expression for the rate of flow of water through the opening of the tap.

Q. Water from a tap emerges vertically downwards with an initial velocity

V_{0}

.assuming pressure is constant throughout the stream of water and the flow is steady, find the distance from the tap at which cross-sectional area of stream is half of the cross-sectional area of stream at the tap:

Q. A solid ball of density half that of water falls freely under gravity from a height of

19.6 m

and then enters a stream of water. Upto what depth will the ball go? [Take

g = 9.8 {m/s}^{2}]

Q. Water from a tap emerges vertically downwards with initial velocity

4 {ms}^{- 1}

. The cross-sectional area of the tap is

A

. The flow is steady and pressure is constant throughout the stream of water. The distance

h

vertically below the tap, where the cross-sectional area of the stream becomes

\frac{2}{3} A

g = 10 {m/s}^{2}

]

Q. The figure shows the commonly observed decrease in diameter of a water stream as it falls from a tap. The tap has internal diameter

D_{0}

and is connected to a large tank of water. The surface of the water is at a height b above the end of the tap. By considering the dynamics of a thin "cylinder' of water in the stream answer the following: (ignore any resistance to the flow and any effects of surface tension, given

ρ_{w}

density of water)
1. Which of the following equation expresses the fact that the flow rate at the tap is the same as at the stream point with diameter D and velocity v (i.e. D in terms of

D_{0}

v_{0}

and v will be):

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Plant Water Relations

BIOLOGY

Watch in App

explore_more_icon

Explore more

Formula for Water Potential

Standard XII Biology

Join BYJU'S Learning Program

CrossIcon