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関連する概念動画

Electric Field Lines01:25

Electric Field Lines

8.9K
The three-dimensional representation of the electric field of a positive point charge requires tracing the electric field vectors, whose lengths decrease as the square of their distance from the charge and which point away from the charge at each point. This vector field is no doubt challenging to visualize. The visualization of electric fields becomes quickly intractable as the number of charges increases.
The solution to this problem is to use electric field lines, which are not vectors but...
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Series R—L Circuit Transients01:22

Series R—L Circuit Transients

298
In a series resistor-inductor (R-L) circuit, closing the switch at the start of the time period simulates a three-phase short circuit, a fault condition where all three phases of an unloaded synchronous machine are short-circuited. When there is no fault impedance and no initial current, the initial voltage is determined by the phase angle of the source voltage.
Using Kirchhoff's Voltage Law (KVL) to analyze this circuit helps determine the total asymmetrical fault current, which consists...
298
Magnetic Field Lines01:19

Magnetic Field Lines

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The representation of magnetic fields by magnetic field lines is very useful in visualizing the strength and direction of the magnetic field. Each of the magnetic field lines forms a closed loop. The field lines emerge from the north pole (N), loop around to the south pole (S), and continue through the bar magnet back to the north pole.
Magnetic field lines follow several hard-and-fast rules:
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Electric Field01:16

Electric Field

12.1K
Consider two point charges, each exerting Coulomb force on the other. It is possible to describe the Coulomb interaction via an intermediate step by defining a new physical quantity called the electric field.
In the new picture, imagine that the first charge sets up an electric field independent of all other charges in the universe. When another charge comes in its vicinity, the second charge experiences an electric force depending on the electric field at that point. The source charge does not...
12.1K
Electrostatic Boundary Conditions01:16

Electrostatic Boundary Conditions

829
Consider an external electric field propagating through a homogeneous medium. When the electric field crosses the surface boundary of the medium, it undergoes a discontinuity. The electric field can be resolved into normal and tangential components. The amount by which the field changes at any boundary is given by the difference between the field components above and below the surface boundary.
The surface integral of an electric field is given by Gauss's law in integral form and is related to...
829
Precipitation of Ions03:11

Precipitation of Ions

29.6K
Predicting Precipitation
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
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関連する実験動画

Updated: Dec 12, 2025

Method for Recording Broadband High Resolution Emission Spectra of Laboratory Lightning Arcs
07:51

Method for Recording Broadband High Resolution Emission Spectra of Laboratory Lightning Arcs

Published on: August 27, 2019

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木星 の 浅い 電気 嵐 から 発生 する 小さい 稲妻

Heidi N Becker1, James W Alexander2, Sushil K Atreya3

  • 1Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA. Heidi.N.Becker@jpl.nasa.gov.

Nature
|August 8, 2020
PubMed
まとめ
この要約は機械生成です。

木星

さらに関連する動画

Bringing the Visible Universe into Focus with Robo-AO
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Bringing the Visible Universe into Focus with Robo-AO

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Experimental Methods of Dust Charging and Mobilization on Surfaces with Exposure to Ultraviolet Radiation or Plasmas
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Experimental Methods of Dust Charging and Mobilization on Surfaces with Exposure to Ultraviolet Radiation or Plasmas

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関連する実験動画

Last Updated: Dec 12, 2025

Method for Recording Broadband High Resolution Emission Spectra of Laboratory Lightning Arcs
07:51

Method for Recording Broadband High Resolution Emission Spectra of Laboratory Lightning Arcs

Published on: August 27, 2019

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Bringing the Visible Universe into Focus with Robo-AO
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Experimental Methods of Dust Charging and Mobilization on Surfaces with Exposure to Ultraviolet Radiation or Plasmas
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科学分野:

  • 惑星科学
  • 大気科学
  • プラズマ物理学

背景:

  • カメラの感度と距離によって制限されています.
  • フラッシュの頻度は年間4×10−3で,空間幅は約30kmである.
  • 5バーレベル近くの湿気コンベクションのトレーサとして解釈されます.

研究 の 目的:

  • ジュノ宇宙船の光学観測を報告する
  • 前例のない詳細で 閃電のエネルギー,持続時間,速度を特徴づけるため
  • 木星の稲妻の発生と発生メカニズムを調査する

主な方法:

  • ジュノ宇宙船の光学機器を使って 雷を検出しました
  • 分析した閃光エネルギーは105×108ジュールです.
  • 計測されたフラッシュの持続時間は5.4ミリ秒で,フラッシュ間隔はミリ秒です.

主要な成果:

  • 観測された木星の閃光の速度は6.1 × 10−2/km/年であり,以前報告されたより数桁高い.
  • 小規模な閃光が検出された 2バーレベル以上の起源を示しています
  • 地上の稲妻に匹敵する 計測された閃電エネルギー

結論:

  • 木星の稲妻は 予想よりかなり速く発生します
  • 2バーレベル以上の稲妻の存在は,フラッシュ生成に水を必要としないことを示唆しています.
  • 複数の雷の生成メカニズムが木星の大気中に作用し,大気伝導と組成のさらなる調査が必要です.