What is the relation between magnetic induction and intensity of magnetic field? B= mue not H whats this?

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Magnetic induction is the creation of a magnetic field by passing an electric current throug a conductable wire of some sort.  The current creates a magnetic field that surrounds the wire.  This was first proven around 1831 by Michael Farraday.  Farraday passed an electric current through an insulated wire, then passed the wire over a compass.  Normally, a compass is affected by the Earths magnetic field, but this compass was affected by the current passing through the wire.  This is the principle of all electromagnets, and has far-ranging application in the industrial world.

If you increase the intensity of the electric current, likewise, you will create a stronger magnetic field.  The magnetic field will sweep outwards, from the north pole to the south, in circular lines that are easily traced with iron filings.  Super-strong electromagnets may be created by passing large amounts of current through their wires.  There is also another relationship with the number of coils, or loops, wrapped around the magnetic core, as to the strength of the magnetic field generated.

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