What is the definition and role of the inductor is?

Inductance coil inductors another name, using the principle of electromagnetic induction devices work. When a current flows through a wire, it will produce a certain electromagnetic field around this conductor, and this in turn will lead the electromagnetic field within the electromagnetic field in a wire range of occurrence of induction. The role of lead generating an electromagnetic field to itself occurs, called "self-inductance," that they produce a change in current wire generates a changing magnetic field, the magnetic field is further influenced the current in the wire; the role of electromagnetic fields in the range of other lead generation called "mutual."

Inductor and capacitor electrical characteristics contrast, the "blocking high-frequency, low-pass." High frequency signal through the inductor coil will encounter strong resistance, difficult to pass; and the low frequency signal when it presented the resistance is relatively small, that low-frequency signals can be more easily through it. Inductor DC resistance of almost zero.

Resistors, capacitors and inductors, their electrical flow in the circuit will show some resistance, this resistance we call "impedance" inductor current signal impedance presented makes use of the self-inductance of the coil. Inductor Sometimes we call it the "inductor" or "coil", with the letter "L" indicates. When wound coil, the number of turns of the coil around we generally call it the coil "turns."

Definition: inductance coil is wound around the wire circle by the insulating tube, wire insulation each other, and the insulating tube may be hollow, can also contain iron or magnetic core, referred inductance. With L said that the unit had Henry (H), milli-Henry (mH), micro Henry (uH), 1H = 10 ^ 3mH = 10 ^ 6uH.

Role: Coils of electrical characteristics and capacitor contrast, the "blocking high-frequency, low-pass." High frequency signal through the inductor coil will encounter strong resistance, difficult to pass; and the low frequency signal when it presented the resistance is relatively small, that low-frequency signals can be more easily through it. Inductor DC resistance of almost zero.