ELECTRONIC PRINCIPLES - OD1647 - LESSON 1/TASK 1
FIGURE 17. INDUCTANCE FACTOR (COIL LENGTH).
(d) Type of Core Material. The fourth physical factor is
the type of core material used with the coil. Figure 18 on the
following page shows two coils: coil (A) with an air core, and
coil (B) with a softiron core. The magnetic core of coil (B)
is a better path for magnetic lines of force than is the
nonmagnetic core of coil (A). The softiron magnetic core's
high permeability has
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