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Air Core Induction Coil

Inductance coil was conducted by using the principle of electromagnetic induction device.When a current flows through a wire, will produce certain electromagnetic field around that wire, and the electromagnetic field of the wire itself will be in within the scope of the electromagnetic field in the conductor induction effect.To generate electromagnetic wire itself, is called a "feeling", i.e., the change of wire itself the changes in the current magnetic field, the magnetic field and further influenced the current in the conductor;On the role of electromagnetic field in the range of other wires produce, called "mutual inductance.

Inductance is a wire by alternating current, in the interior of the wire and the surrounding to produce alternating magnetic flux, conductor magnetic flux and the flux of the ratio of the current production.
When the dc inductance of the current through its only present fixed around magnetic field lines, does not change with time;But when by alternating current in the coil, the surrounding magnetic field lines will appear over time changes.According to the ferrari brother's law of electromagnetic induction, magnetic electricity to analyze, change the lines of magnetic force on both ends of the coil can produce induction electric potential, the induction electric potential is equivalent to a "new power".When form a closed loop, the induction electric potential to produce induced current.Produced by lenz's law know induced current amount of magnetic field lines to keep the original of the change of the magnetic field lines.Changes due to the original lines derived from plus alternating power supply, therefore, from the objective effect, inductor have block communication, change characteristics of current in the circuit.Inductance coil have similar characteristics and mechanics of inertia, called "self induction" on electricity, usually in the open or connect knife switch, knife switch can produce sparks, this is self inductance phenomenon produces high induction electric potential

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