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State Gauss's law in magnetism and write...

State Gauss's law in magnetism and write the same in the mathmatical form.

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The net magnetic flux through any closed surface is zero .
i.e., `phi_(B)=sum_("all")vecB.DeltavecS=0 " ""or"" " phi_(B)=ointvecB.dDeltavecS=0`
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