მაგნიტური ნაკადი: განსხვავება გადახედვებს შორის

(ახალი გვერდი: {{ითარგმნება}} '''Magnetic flux''', represented by the Greek letter Φ (phi), is a measure of quantity of magnetism, tak...)
 
for any [[closed surface]] ''S''.
 
==ღია ზედაპირის გამჭოლი მაგნიტური ნაკადი==
==Magnetic flux through an open surface==
{{მთავარი|ფარადეის ინდუქციის კანონი}}
{{main|Faraday's law of induction}}
[[Imageსურათი:Vector field on a surface.PNG|right|thumb|250px|Figure 3: A vector field '''''F''''' ( '''''r''''', ''t'' ) defined throughout space, and a surface Σ bounded by curve ∂Σ moving with velocity '''''v''''' over which the field is integrated.]]
While the magnetic flux through a [[closed surface]] is always zero, the magnetic flux through an [[open surface]] is an important quantity in electromagnetism. For example, a change in the magnetic flux passing through a loop of conductive wire will cause an [[electromotive force]], and therefore an electric current, in the loop. The relationship is given by [[Faraday's law of induction|Faraday's law]]:
 
:<math>\mathcal{E} = \oint_{\partial \Sigma (t)}\left( \mathbf{E}( \mathbf{r},\ t) +\mathbf{ v \times B}(\mathbf{r},\ t)\right) \cdot d\boldsymbol{\ell} = -{d\Phi_m \over dt},</math>
 
whereსადაც (see Figure 3):
:''<font style="font-family: Brush Script MT; font-size:130%;">E</font>'' is the [[electromotive force|EMF]],
:<font style="font-family: Times New Roman; font-size:110%;">Φ</font><sub>m</sub> is the flux through a surface with an opening bounded by a curve '''''∂Σ'''''(''t''),
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