The venturi-meter works on:
 1 The principle of perpendicular axes 2 Huygen's principle 3 Bernoulli's principle 4 The principle of parallel axes
Subtopic: Â Bernoulli's Theorem |
Â 82%
From NCERT
NEET - 2023
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A fluid of density $$\rho~$$is flowing in a pipe of varying cross-sectional area as shown in the figure. Bernoulli's equation for the motion becomes:

1.  $$p+\frac12\rho v^2+\rho gh\text{=constant}$$
2. $$p+\frac12\rho v^2\text{=constant}$$
3. $$\frac12\rho v^2+\rho gh\text{=constant}$$
4. $$p+\rho gh\text{=constant}$$

Subtopic: Â Bernoulli's Theorem |
Â 88%
From NCERT
NEET - 2022
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A small hole of an area of cross-section $$2~\text{mm}^2$$ is present near the bottom of a fully filled open tank of height $$2~\text{m}$$. Taking $$g = 10~\text{m/s}^2$$${}^{}$, the rate of flow of water through the open hole would be nearly:
1. $$6.4\times10^{-6}~\text{m}^{3}/\text{s}$$
2. $$12.6\times10^{-6}~\text{m}^{3}/\text{s}$$
3. $$8.9\times10^{-6}~\text{m}^{3}/\text{s}$$
4. $$2.23\times10^{-6}~\text{m}^{3}/\text{s}$$

Subtopic: Â Bernoulli's Theorem |
Â 74%
From NCERT
NEET - 2019
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A wind with a speed of $$40$$ m/s blows parallel to the roof of a house. The area of the roof is $$250$$ m2. Assuming that the pressure inside the house is atmospheric pressure, the force exerted by the wind on the roof and the direction of the force will be: ($$\rho_{\text {air }}=1.2$$)
1. $$4 \times 10^5$$ N, downwards
2. $$4 \times 10^5$$ N, upwards
3. $$2.4 \times 10^5$$ N, upwards
4. $$2.4 \times 10^5$$ N, downwards

Subtopic: Â Bernoulli's Theorem |
Â 70%
From NCERT
NEET - 2015
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