Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Lenz's Law01:15

Lenz's Law

3.9K
The direction in which the induced emf drives the current around a wire loop can be found through the negative sign. However, it is usually easier to determine this direction with Lenz's law, named in honor of its discoverer, Heinrich Lenz (1804–1865). Lenz's law states that the direction of the induced emf drives the current around a wire loop always to oppose the change in magnetic flux that causes the emf.
If a bar magnet is moved toward a coil such that the magnetic flux...
3.9K
Faraday's Law01:10

Faraday's Law

4.1K
Faraday's law state that the induced emf is the negative change in the magnetic flux per unit of time. Any change in the magnetic field or change in the orientation of the area of the coil with respect to the magnetic field induces a voltage (emf). The magnetic flux measures the number of magnetic field lines through a given surface area. Magnetic flux is estimated from the integral of the dot product of the magnetic field vector and the area vector. The negative sign describes the...
4.1K
Probability Laws01:49

Probability Laws

40.8K
Overview
40.8K
Biot-Savart Law01:19

Biot-Savart Law

6.1K
The Biot-Savart law gives the magnitude and direction of the magnetic field produced by a current. This empirical law was named in honor of two scientists, Jean-Baptiste Biot and Félix Savart, who investigated the interaction between a straight, current-carrying wire and a permanent magnet.
A current-carrying wire creates a magnetic field in its vicinity. Consider an infinitesimal current element dl in a wire. The direction of vector dl is along the direction of the current. The total magnetic...
6.1K
Induction01:16

Induction

4.0K
An emf is induced when the magnetic field in a coil is changed by pushing a bar magnet into or out of the coil. emfs of opposite signs are produced by motion in opposite directions, and the directions of emfs are also reversed by reversing poles. The same results are produced if the coil is moved rather than the magnet—it is the relative motion that is important. The faster the motion, the greater the emf. Additionally, there is no emf when the magnet is stationary relative to the coil.
A...
4.0K
Newton's Law of Motion01:20

Newton's Law of Motion

3.8K
When we observe objects around us, one question that comes to mind is why they move or stay still. The answer to this question can be explained using Newton's laws of motion. These laws describe the fundamental principles of motion and the effects of forces on objects.
The first law of motion, also known as the law of inertia, states that an object at rest will stay at rest, and an object in motion will continue to move at a constant speed and direction unless acted upon by an external...
3.8K

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Coupling of colloidal rods to the dynamic order of active nematic films.

Soft matter·2026
Same author

Flow coupling alters topological phase transition in nematic liquid crystals.

Journal of physics. Condensed matter : an Institute of Physics journal·2026
Same author

Emergent collective alignment gives competitive advantage to longer cells during range expansion.

Nature communications·2025
Same author

Hyphal growth determines spatial organization and coexistence in a pathogenic polymicrobial community in a spatially structured environment.

The ISME journal·2025
Same author

Motility-Induced Phase Separation Is Maxwell-like Fluid with an Extended and Nonmonotonic Crossover.

Physical review letters·2025
Same author

Strings and topological defects govern ordering kinetics in endothelial cell layers.

Nature physics·2025
Same journal

Erratum: Spectroscopy and Ground-State Transfer of Ultracold Bosonic ^{39}K^{133}Cs Molecules [Phys. Rev. Lett. 135, 203401 (2025)].

Physical review letters·2026
Same journal

Erratum: Lifetime of the ^{2}F_{7/2} Level in Yb^{+} for Spontaneous Emission of Electric Octupole Radiation [Phys. Rev. Lett. 127, 213001 (2021)].

Physical review letters·2026
Same journal

Laser-Plasma Based Seeded Free Electron Laser in the High-Gain Regime.

Physical review letters·2026
Same journal

Parent Hamiltonians for Stabilizer Quantum Many-Body Scars.

Physical review letters·2026
Same journal

Properties of Heavy Cosmic Nuclei Phosphorus, Chlorine, Argon, Potassium, and Calcium: Results from the Alpha Magnetic Spectrometer.

Physical review letters·2026
Same journal

Role of Spin-Isospin Symmetries in Nuclear β-Decays.

Physical review letters·2026
查看所有相关文章

相关实验视频

Updated: Jun 26, 2025

Application of Voltage in Dynamic Light Scattering Particle Size Analysis
07:51

Application of Voltage in Dynamic Light Scattering Particle Size Analysis

Published on: January 24, 2020

9.9K

活动达西定律达西定律

Ryan R Keogh1, Timofey Kozhukhov1, Kristian Thijssen2

  • 1School of Physics and Astronomy, The University of Edinburgh, Peter Guthrie Tait Road, Edinburgh, EH9 3FD, United Kingdom.

Physical review letters
|May 17, 2024
PubMed
概括
此摘要是机器生成的。

通过多孔介质驱动活跃的细菌液体可以增强流量,抵制零流动的活跃流. 一个最佳的细菌活动最大限度地提高了这种增强的流动,由一个新的活跃达西描述.

更多相关视频

Measurement of Particle Size Distribution in Turbid Solutions by Dynamic Light Scattering Microscopy
09:16

Measurement of Particle Size Distribution in Turbid Solutions by Dynamic Light Scattering Microscopy

Published on: January 9, 2017

14.4K
Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level
06:55

Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level

Published on: September 26, 2016

7.9K

相关实验视频

Last Updated: Jun 26, 2025

Application of Voltage in Dynamic Light Scattering Particle Size Analysis
07:51

Application of Voltage in Dynamic Light Scattering Particle Size Analysis

Published on: January 24, 2020

9.9K
Measurement of Particle Size Distribution in Turbid Solutions by Dynamic Light Scattering Microscopy
09:16

Measurement of Particle Size Distribution in Turbid Solutions by Dynamic Light Scattering Microscopy

Published on: January 9, 2017

14.4K
Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level
06:55

Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level

Published on: September 26, 2016

7.9K

科学领域:

  • 物理 物理学 物理
  • 生物物理学的生物物理.
  • 流体动力学 流体动力学

背景情况:

  • 细菌群在开放空间中表现出活跃的动荡.
  • 自然,细菌居住在拥挤的环境中,包括多孔介质.
  • 了解这种复杂环境中的流体动力学至关重要.

研究的目的:

  • 通过多孔介质对驱动活性流体的影响进行数值研究.
  • 为活跃流体运输开发一个增强的达西定律.
  • 为了确定在多孔介质中增强流量的最佳条件.

主要方法:

  • 在多孔介质中的活性流体动力学的数值模拟.
  • 在活性和压力驱动力组合下分析流动行为.
  • 积极贡献的纳入达西法.

主要成果:

  • 通过多孔介质驱动无序的活性液体增强了达西定律.
  • 混合主动/驱动的流量比纯压力驱动的流量显示出更大的漂移.
  • 流量增强与活动是非单调的,揭示了最佳活动水平.

结论:

  • 在多孔介质中的活性流体运输可以增强到压力驱动的流量之外.
  • 建议使用一个活跃的达西定律来模拟这种异常运输.
  • 最佳的细菌活动可以在拥挤的环境中最大限度地提高流量.