If the resistor, it only has a resistance value of the inductor she has a resistance value (R) and the value of inductance (L). Where the magnitude of the inductance value depends on the number of windings (N), the windings cross-sectional area (A) and the long axis of the windings (l). Mathematical relation can be written as follows:
μo is the permeability of the air -> μ0 = 4π x 10 -7 H / m
μr is the permeability of ferromagnetic materials
Example
Determine the inductance coil iron core as shown below:
Completion:
If the iron core inductor is mounted such that the value of μr = 2000. Then the value of inductance to be:
L = μrLo = (2000) (1.58 × 10-6) = 3.16 mH.
Inductor is a passive element which has the properties to save energy as well as the stored energy spring pad. M. Faraday is experimentals British scholar who discovered the unique phenomenon of the inductor and inductance. That the magnetic field is always changing every moment can induce a voltage in an adjacent circuit. Faraday may indicate that the magnitude of the induced voltage is proportional to the rate of change of current versus time that generates the magnetic field and a constant which is then referred to as inductance (L), so that
