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相关概念视频

Magnetic Field Of A Current Loop01:16

Magnetic Field Of A Current Loop

4.3K
Consider a circular loop with a radius a, that carries a current I. The magnetic field due to the current at an arbitrary point P along the axis of the loop can be calculated using the Biot-Savart law.
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Magnetic Force On Current-Carrying Wires: Example01:22

Magnetic Force On Current-Carrying Wires: Example

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In a magnetic field, moving charges encounter a force. If a wire contains these moving charges, i.e., if the wire is carrying a current, then a force acts on the wire as well. Consider a pair of flexible leads holding a wire that is 40 cm long and 10 g in weight in a horizontal position. The wire is placed in a constant magnetic field of 0.40 T, as shown in Figure 1(a). Determine the magnitude and direction of the current flowing in the wire needed to remove the tension in the supporting leads.
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Magnetic Force Between Two Parallel Currents01:13

Magnetic Force Between Two Parallel Currents

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Two long, straight, and parallel current-carrying conductors exert a force of equal magnitude on one another. The direction of the force depends on the current direction in the conductors.
The force exerted by the magnetic field due to the first conductor over a finite length of the second conductor is given as the product of the current in the second conductor and  the vector product of the length vector along the current element and the field due to the first conductor. According to the...
3.5K
Magnetic Force On A Current-Carrying Conductor01:25

Magnetic Force On A Current-Carrying Conductor

4.0K
Moving charges experience a force in a magnetic field. Since the magnetic fields produced by moving charges are proportional to the current, a conductor carrying a current creates a magnetic field around it.
Consider a compass placed near a current-carrying wire. The wire experiences a force that aligns the needle of the compass tangentially around the wire. Thus, the current-carrying wire produces concentric circular loops of magnetic field. The magnetic field generated by a wire can be...
4.0K
Traveling Waves: Lossless Lines01:27

Traveling Waves: Lossless Lines

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The provided content explores the behavior of traveling waves on single-phase lossless transmission lines. It begins with a single-phase two-wire lossless transmission line of length Δx, characterized by a loop inductance LH/m and a line-to-line capacitance C F/m. These parameters result in a series inductance LΔx  and a shunt capacitance CΔx.
115
Magnetic Field Due to Two Straight Wires01:18

Magnetic Field Due to Two Straight Wires

2.3K
Consider two parallel straight wires carrying a current of 10 A and 20 A in the same direction and separated by a distance of 20 cm. Calculate the magnetic field at a point "P2", midway between the wires. Also, evaluate the magnetic field when the direction of the current is reversed in the second wire.
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Evolution of Staircase Structures in Diffusive Convection
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随机步行与水平和周期电流的随机步行

Joanna Li1,2, Matthew Gerry1, Israel Klich3

  • 1University of Toronto, Department of Physics, 60 Saint George St., Toronto, Ontario M5S 1A7, Canada.

Physical review. E
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概括
此摘要是机器生成的。

最小的双链随机步行模型中的波动揭示了它的结构和不平衡条件. 分析电流和累积物有助于理解各种系统中的传输特性.

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科学领域:

  • 统计物理 统计物理
  • 非线性动力学是一种非线性动力学.
  • 复杂的系统复杂的系统.

背景情况:

  • 了解合系统中的运输现象对于材料科学和细胞生物学等领域至关重要.
  • 描述不平衡条件和系统参数通常依赖于宏观观测,但微观波动可以提供更深入的见解.

研究的目的:

  • 调查最小的双链随机步行模型中运输的波动和更高阶累积物如何提供有关其结构,参数和不平衡性质的信息.
  • 探索这些可观测的实用性,无论是在稳定状态和过渡状态.

主要方法:

  • 构建一个最小的双链随机步行模型,具有水平和循环运输.
  • 累积生成函数的导出,以描述长时间限制中的运输.
  • 分析各种条件下的电流波动和高阶累积值,包括零水平电流.
  • 在达到稳定状态之前,运输动态的模拟.

主要成果:

  • 水平或循环电流及其累积物可以独特地识别模型结构和参数.
  • 水平电流波动信号不平衡条件,即使平均电流为零.
  • 的产量率实际上是以循环或水平电流在零水平电流极限附近的相对噪声为下限.
  • 链间跳转率可以从短暂运输模拟中提取.

结论:

  • 运输现象的波动包含有关底层系统动态和参数的丰富信息.
  • 开发的模型和分析框架为描述复杂的运输系统提供了强大的工具.
  • 潜在的应用范围包括化学网络,生物过程和用于电荷和能量传输的先进材料.