Inductance of a coil Varies

The inductance of a coil varies directly as the square of the number of turns, directly as the cross-sectional area of the magnetic core, and inversely as the length of the iron path.

The inductance of a coil is a measure of its ability to store energy in a magnetic field. The more turns a coil has, the stronger the magnetic field it will create. The larger the cross-sectional area of the magnetic core, the more magnetic flux can be stored in the core. The shorter the length of the iron path, the

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