安培环路定律 - 维基百科，自由的百科全书
安培環路定律[1] （英語： Ampère's circuital law）常直接簡稱為“安培定律”，是由 安德烈-馬里·安培 於1826年提出的一條 靜磁學 基本定律。 安培環路定律表明了：在 真空 中 載流導線 所載有的穩恆 電流，與 磁感应强度 沿著環繞導線的任意閉合迴路（環路，closed loop） [註 1] 的路徑積分（環場積），兩者之間的關係為. 其中， 是環繞著導線的閉合迴路， 是 磁感应强度 （又稱為B場）， 是微小線元素向量， 是 磁常數， 是閉合迴路 所圍住的電流。 亦即，在真空中的稳恒电流 …
12.6: Ampère’s Law - Physics LibreTexts
Ampère’s law states that \(\oint \vec{B} \cdot d\vec{l} = \mu_0 I\) where I is the total current passing through the enclosed loop. The quickest way to evaluate the integral is to calculate \(\mu_0 I\) by finding the net current through the loop.
安培定律 - 百度百科
安培定律（Ampere's law）是电流与电流之间磁相互作用的规律，于1820年由安培发现，是电磁学的基本定律之一。 其内容为：两个元电流之间相互作用力的大小分别与它们的电流强度I1、I2以及两电流元长度ds1、ds2成正比，与其间的距离r12平方成反比。
Ampere's Law: Definition, Equation, and Application - Science Facts
2023年2月2日 · Ampere’s law, or Ampere’s circuital law, is a mathematical statement used in electromagnetism that gives a relationship between a current and the magnetic field it generates. The magnetic field produced by an electric current is proportional to the magnitude of the current with a proportionality constant equal to the permeability of free ...
Ampère's circuital law - Wikipedia
In classical electromagnetism, Ampère's circuital law (not to be confused with Ampère's force law) [1] relates the circulation of a magnetic field around a closed loop to the electric current passing through the loop. James Clerk Maxwell derived it using hydrodynamics in his 1861 published paper "On Physical Lines of Force". [2]
Ampère's force law - Wikipedia
In magnetostatics, the force of attraction or repulsion between two current-carrying wires (see first figure below) is often called Ampère's force law. The physical origin of this force is that each wire generates a magnetic field , following the Biot–Savart law , and the other wire experiences a magnetic force as a consequence, following ...
Ampere's Law - Definition, Statement, Examples, Equation, Video ...
What Is Ampere’s Law? According to Ampere’s law, magnetic fields are related to the electric current produced in them. The law specifies the magnetic field that is associated with a given current or vice-versa, provided that the electric field doesn’t change with …
22.3: Ampere’s Law - Physics LibreTexts
2024年3月28日 · Ampere’s Law is similar to Gauss’ Law, as it allows us to (analytically) determine the magnetic field that is produced by an electric current in configurations that have a high degree of symmetry. Ampere’s Law states: ∮B ⋅ dl = μ0Ienc (22.3.1) (22.3.1) ∮ B → ⋅ d l → = μ 0 I e n c.
Ampère's Law – The Physics Hypertextbook
ampère's law. Everything's better with Ampère's law (almost everything). André-Marie Ampère (1775–1836) France. The law in integral form. ∮B ⋅ ds = μ 0 I. The law in differential form. ∇ × B = μ 0 J. These forms of the law are incomplete. The full law has an added term called the displacement current.
4.5: Ampére's Law - Physics LibreTexts
This magnetic version of the electrical Gauss's law is called Ampére's law, and since it can't involve enclosed point sources, it instead deals with lines of current, which either circle back on themselves to form a closed circuit, or are infinitely-long (and circle-back on themselves at infinity). But how do we "enclose" a line of current?