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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 81%

From NCERT

NEET - 2023

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The amount of energy required to form a soap bubble of radius \(2~\text{cm}\) from a soap solution is nearly:

\((\)Surface tension of soap solution \(0.03~\text{Nm}^{-1})\)

1. \(50.1 \times 10^{-4}~\text{J}\)

2. \(30.16 \times 10^{-4}~ \text{J}\)

3. \(5.06 \times 10^{-4} ~\text{J}\)

4. \(3.01\times 10^{-4} ~\text{J}\)

\((\)Surface tension of soap solution \(0.03~\text{Nm}^{-1})\)

1. \(50.1 \times 10^{-4}~\text{J}\)

2. \(30.16 \times 10^{-4}~ \text{J}\)

3. \(5.06 \times 10^{-4} ~\text{J}\)

4. \(3.01\times 10^{-4} ~\text{J}\)

Subtopic: Â Surface Tension |

Â 54%

From NCERT

NEET - 2023

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Which of the following statements is not true?

1. | The coefficient of viscosity is a scalar quantity. |

2. | Surface tension is a scalar quantity. |

3. | Pressure is a vector quantity. |

4. | Relative density is a scalar quantity. |

Subtopic: Â Pressure |

Â 71%

From NCERT

NEET - 2023

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The viscous drag acting on a metal sphere of diameter \(1\) mm, falling through a fluid of viscosity \(0.8\) Pa-s with a velocity of \(2\) ms^{-1} is equal to:

1. \(15\times 10^{-3}~\mathrm{N}\)

2. \(30\times 10^{-3}~\mathrm{N}\)

3. \(1.5\times 10^{-3}~\mathrm{N}\)

4. \(20\times 10^{-3}~\mathrm{N}\)

1. \(15\times 10^{-3}~\mathrm{N}\)

2. \(30\times 10^{-3}~\mathrm{N}\)

3. \(1.5\times 10^{-3}~\mathrm{N}\)

4. \(20\times 10^{-3}~\mathrm{N}\)

Subtopic: Â Stokes' Law |

Â 57%

From NCERT

NEET - 2023

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If a soap bubble expands, the pressure inside the bubble:

1. | is equal to the atmospheric pressure | 2. | decreases |

3. | increases | 4. | remains the same |

Subtopic: Â Surface Tension |

Â 67%

From NCERT

NEET - 2022

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NEET 2023 - Target Batch - Aryan Raj Singh

A spherical ball is dropped in a long column of a highly viscous liquid. The curve in the graph shown, which represents the speed of the ball (\(v\)) as a function of time (\(t\)) is:

1. \(D\)

2. \(A\)

3. \(B\)

4. \(C\)

1. \(D\)

2. \(A\)

3. \(B\)

4. \(C\)

Subtopic: Â Viscosity |

Â 70%

From NCERT

NEET - 2022

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The correct statement about the variation of viscosity of fluids with an increase in temperature is:

1. | viscosity of gases decreases. |

2. | viscosity of both liquids and gases increases. |

3. | viscosity of liquids increases. |

4. | viscosity of liquids decreases. |

Subtopic: Â Viscosity |

Â 73%

From NCERT

NEET - 2022

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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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Air is pushed carefully into a soap bubble of radius \(r\) to double its radius. If the surface tension of the soap solution is \(T,\) then work done in the process is:

1. | \(12\pi r^2T\) | 2. | \(24\pi r^2T\) |

3. | \(4\pi r^2T\) | 4. | \(8\pi r^2T\) |

Subtopic: Â Surface Tension |

Â 59%

From NCERT

NEET - 2022

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Two copper vessels \(A\) and \(B\) have the same base area but are of different shapes. \(A\) takes twice the volume of water that \(B\) requires to fill up to a particular common height. Then the correct statement among the following is:

1. | pressure on the base area of vessels \(A\) and \(B\) is same. | 2. | pressure on the base area of vessels \(A\) and \(B\) is not same. |

3. | both vessels \(A\) and \(B\) weigh the same. | 4. | vessel \(B\) weighs twice that of \(A\). |

Subtopic: Â Pressure |

Â 67%

From NCERT

NEET - 2022

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NEET 2023 - Target Batch - Aryan Raj Singh

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