Why is the inductor always a solenoid?
In its most basic form, an Inductor is nothing more than a coil of wire wound around a central core. For most coils the current, ( i ) flowing through the coil produces a magnetic flux, ( NΦ ) around it that is proportional to this flow of electrical current.
The Inductor, also called a choke, is another passive type electrical component which is just a coil of wire that is designed "to take advantage of this relationship by inducing a magnetic field in itself or in the core as a result of the current passing through the coil" (main point )
. This results in a much stronger magnetic field than one that would be produced by a simple coil of wire.
Inductors are formed with wire tightly wrapped around a solid central core which can be either a straight cylindrical rod or a continuous loop or ring to concentrate their magnetic flux.
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