Positive and Negative Magnetic flux/Gauss's law in magnetism/Magnetism and matter/12th Physics

The difference b/w the Gauss's law of magnetism and that for Electrostatics is due to the fact that Isolated magnetic poles or monopoles don't exist.There are no sources or sinks of B vector.The simplest magnetic element is a dipole or a current loop.

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Magnetic flux leaving a surface is positive and Magnetic flux entering a surface is negative.This is by convention that outward area vector is taken as positive.

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