Basic electronics concepts like what is resistor , inductor capacitor

Basic electronics concepts like , what is resistor, capacitor, inductor and resistor color coding and inductor colour coding

48. What is Air Core Inductor?
A type of inductor or a wire coil without a magnetic
core in the coil is known as an air core inductor or air
coil inductor. In this inductor, an air core ensures a
lower peak inductance, however, it also decreases
the energy losses associated by means of ferrite
inductors. The lack of core losses permits air core
inductors to function at maximum frequencies. These
types of inductors are utilized whenever the amount of
inductance is less required and they do not have a core
loss because there is no core. However, the number of
turns in this inductor should be more as compared to
other inductors which have the core. Generally, ceramic
inductors are frequently called air-core inductors

49. Construction
The air core inductor’s basic construction is, it
consists of coils with a number of wire turns that
are wounded on ordinary cardboard. So,
ceramics or plastic former may be utilized as an
insulating material. In this inductor, the gap in a
paper or plastic former works like a core. So this
gap has nothing but it has air inside of the former,
so known as the air core inductor. Therefore, air
works as a core.

50. Working Principle
These inductors work on the basis that air
has a fairly minimum electrical
conductivity. So the air-core inductance is
also low, producing a weak magnetic field.
Because of the small magnetic field
generation of air cores’, it achieves a
faster current rise while avoiding signal
loss. This loss mainly happens whenever
an inductor generates high magnetic field
strengths within an electric circuit.