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関連する概念動画

Magnetic Fields01:27

Magnetic Fields

6.0K
A moving charge or a current creates a magnetic field in the surrounding space, in addition to its electric field. The magnetic field exerts a force on any other moving charge or current that is present in the field. Like an electric field, the magnetic field is also a vector field. At any position, the direction of the magnetic field is defined as the direction in which the north pole of a compass needle points.
A magnetic field is defined by the force that a charged particle experiences...
6.0K
Magnetic Field Lines01:19

Magnetic Field Lines

5.4K
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:
5.4K
Magnetic Field Of A Current Loop01:16

Magnetic Field Of A Current Loop

6.1K
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.
6.1K
Magnetic Field of a Solenoid01:18

Magnetic Field of a Solenoid

5.6K
A solenoid is a conducting wire coated with an insulating material, wound tightly in the form of a helical coil. The magnetic field due to a solenoid is the vector sum of the magnetic fields due to its individual turns. Therefore, for an ideal solenoid, the magnetic field within the solenoid is directly proportional to the number of turns per unit length and the current. Conversely, the magnetic field outside the solenoid is zero.
Consider a solenoid with 100 turns wrapped around a cylinder of...
5.6K
Magnetic Flux01:18

Magnetic Flux

4.2K
The magnetic flux measures the number of magnetic field lines passing through a given surface area. The SI unit for magnetic flux is the weber (Wb). Magnetic flux is a scalar quantity. It depends on three factors: the strength of the magnetic field B, the area through which the field lines pass, and the relative orientation of the field with the surface area.
Suppose a surface is divided into elements of area dA. For each element, the component of the magnetic field that is normal to the...
4.2K
Magnetic Field Due to Two Straight Wires01:18

Magnetic Field Due to Two Straight Wires

5.2K
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.
5.2K

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関連する実験動画

Updated: May 3, 2026

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples
07:01

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples

Published on: June 9, 2016

9.2K

巨大な磁場を測定する.

M Tatarakis1, I Watts, F N Beg

  • 1The Blackett Laboratory, Imperial College of Science, Technology and Medicine, London SW7 2BZ, UK. m.tatarakis@ic.ac.uk

Nature
|January 18, 2002
PubMed
まとめ
この要約は機械生成です。

研究者らは,実験室で最強の磁場を測定し,340メガガウスを超えた. これらの強烈なフィールドは,臨界密度の表面に近いレーザー-プラズマ相互作用で生成された.

さらに関連する動画

Fabrication of Magnetic Platforms for Micron-Scale Organization of Interconnected Neurons
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Fabrication of Magnetic Platforms for Micron-Scale Organization of Interconnected Neurons

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Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains
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Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains

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関連する実験動画

Last Updated: May 3, 2026

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples
07:01

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples

Published on: June 9, 2016

9.2K
Fabrication of Magnetic Platforms for Micron-Scale Organization of Interconnected Neurons
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Fabrication of Magnetic Platforms for Micron-Scale Organization of Interconnected Neurons

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Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains
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科学分野:

  • プラズマ物理学のプラズマ物理学
  • 高エネルギー密度物理学の物理学
  • 天体物理プラズマシミュレーション

背景:

  • 理論的なモデルは,レーザーで生成されたプラズマの強い磁場を予測しています.
  • これらのフィールドは,レーザーエネルギーの吸収に不可欠な,臨界密度の表面の近くで予想されます.
  • これらの領域の直接的な実験的な測定は,大きな課題となっています.

研究 の 目的:

  • レーザー-プラズマ相互作用で予測された磁場の存在と大きさを実験的に検証する.
  • 研究室でこれまでに記録された最高の磁場強度を達成するために.
  • 激烈なレーザーと物質の相互作用の間に発生する磁場のダイナミクスを調査する.

主な方法:

  • 高強度レーザーパルスを使用して,密度の高いプラズマを作成します.
  • 磁場を検知し,定量化するために極測測定を用いる.
  • 診断ツールとして,自己生成されたレーザーハーモニクスを分析する.

主要な成果:

  • 340メガガウスを超える磁場を成功裏に記録しました.
  • これまでで最も高い実験室磁場測定を達成しました.
  • これらの極端なフィールドをレーザーハーモニック診断を用いて測定する可能性を実証した.

結論:

  • 実験的証拠は,レーザーで生成されたプラズマに巨大な磁場が存在することを確認しています.
  • この研究は,実験室の磁場生成に新しい基準を提供している.
  • この発見は,天体物理学現象と慣性収束融合の理解に意味を持ちます.