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It is not that we 'need' to use an infinite wire or plane. For example, I am sure there must be problems in the N.C.E.R.T. textbooks where you use a finite charged wire to calculate the electric field at a given point. The point of using infinite wire or plane is that once you know the perpendicular distance of the point from the wire or the plane of the ...


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You can get this more "intuitively" (idiosyncratically): the flux of this force in closed surface is equal to the quantity of source inside (is a Gauss's Law). This source could be a mass or a charge. The physical picture is: the pressure applied in a closed surface by the field-force is proportional to the quantity of source inside. You can get the ...


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Something like that. In metal shel, charge distribute in the surface. So in this case, when you conect the center sphere with the wire, all the charges goes to the surface of the outer sphere. Then, the charge in the surface of the outer sphere is 2Q-Q=Q.


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There are no magnetic monopoles. i.e. Unlike electric field flux, there are no sources or sinks of magnetic flux. Therefore the amount of flux entering any closed volume must equal the amount exiting.


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If the flux in and out of a surface cancles, there is no need for magnetic charge in which field lines can end or start (e.g. like the electric charge). One expresses this like $$ \nabla \cdot \vec{B} = 0 $$ wich means $$ 0 = \int_V \nabla \cdot \vec{B} ~ dV = \int_S \vec{B} \cdot d\vec{S} $$ where $S$ is the surface of the volume $V$.


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Can someone explain this in simpler terms? Typically, the closed surface is a mathematical surface (Gaussian surface) which simply defines an 'inside' and 'outside'. Since, as far as we know, there are no magnetic charges from which magnetic field lines start or end, any magnetic field line entering must exit through the surface; any magnetic field ...


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When using Gauss's law to calculate the flux through a closed surface we take the field component in the normal direction of the surface. The normal direction always points outward for the closed surface. Going by the math, it seems like you're making a Gaussian cylinder that encloses one of the plates. The difference between making a cylinder that ...


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Monopoles: Either north or south pole alone. Dipoles: Both north and south pole in each other's influence The Magnetic field of lines originate from North Pole and end at south pole. Gauss's law of Magnetostatics states that total magnetic flux from a closed surface is zero. That is number of incoming field line equals the number of outgoing lines. I.E. ...


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All the above answers are correct,although none gives you an answer as to WHY you should NOT use a sphere and none addresses your "infinite gaussian surface" problem and you seem to be a bit confused on how things actually work(you have to understand how things work before you delve into the mathematics part). So,if you use a sphere,then your integral of ...



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